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PL/SQL tutorial 60: Collection Method EXISTS in Oracle Database by Manish Sharma
 
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RebellionRider presents you the latest PL/SQL Tutorial 60 on Collection method EXISTS by Manish Sharma ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/exists-function Previous Tutorial ► ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ------------------------------------------------------------------------- ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 8057 Manish Sharma
SQL script to insert into many to many table
 
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Text Article http://csharp-video-tutorials.blogspot.com/2017/02/sql-script-to-insert-into-many-to-many.html Slides http://csharp-video-tutorials.blogspot.com/2017/02/sql-script-to-insert-into-many-to-many_6.html SQL Server Interview Questions and Answers text articles & slides http://csharp-video-tutorials.blogspot.com/2014/05/sql-server-interview-questions-and.html SQL Server Interview Questions and Answers playlist https://www.youtube.com/playlist?list=PL6n9fhu94yhXcztdLO7i6mdyaegC8CJwR All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss how to insert data into a table that has many-to-many relationship Create table Students ( Id int primary key identity, StudentName nvarchar(50) ) Go Create table Courses ( Id int primary key identity, CourseName nvarchar(50) ) Go Create table StudentCourses ( StudentId int not null foreign key references Students(Id), CourseId int not null foreign key references Courses(Id) ) Go Students - Id column is identity column Courses - Id column is identity column StudentCourses - StudentId and CourseId columns are foreign keys referencing Id column in Students and Courses tables As you can see, StudentCourses is a bridge table that has many to many relationship with Students and Courses tables. This means a given student can be enrolled into many courses and a given course can have many students enrolled. Below is the question asked in an interview for SQL Server Developer role. Write a SQL script to insert data into StudentCourses table. Here are the rules that your script should follow. 1. There will be 2 inputs for the script Student Name - The name of the student who wants to enroll into a course Course Name - The name of the course the student wants to enroll into 2. If the student is already in the Students table, then use that existing Student Id. If the student is not already in the Students table, then a row for that student must be inserted into the Students table, and use that new student id. 3. Along the same lines, if the course is already in the Courses table, then use that existing Course Id. If the course is not already in the Courses table, then a row for that course must be inserted into the Courses table, and use that new course id. 4. There should be no duplicate student course enrollments, i.e a given student must not be enrolled in the same course twice. For example, Tom must not be enrolled in C# course twice. Answer : To avoid duplicate student course enrollments create a composite primary key on StudentId and CourseId columns in StudentCourses table. With this composite primary key in place, if someone tries to enroll the same student in the same course again we get violation of primary key constraint error. Alter table StudentCourses Add Constraint PK_StudentCourses Primary Key Clustered (CourseId, StudentId) Here is the SQL script that inserts data into the 3 tables as expected Declare @StudentName nvarchar(50) = 'Sam' Declare @CourseName nvarchar(50) = 'SQL Server' Declare @StudentId int Declare @CourseId int -- If the student already exists, use the existing student ID Select @StudentId = Id from Students where StudentName = @StudentName -- If the course already exists, use the existing course ID Select @CourseId = Id from Courses where CourseName = @CourseName -- If the student does not exist in the Students table If (@StudentId is null) Begin -- Insert the student Insert into Students values(@StudentName) -- Get the Id of the student Select @StudentId = SCOPE_IDENTITY() End -- If the course does not exist in the Courses table If (@CourseId is null) Begin -- Insert the course Insert into Courses values(@CourseName) -- Get the Id of the course Select @CourseId = SCOPE_IDENTITY() End -- Insert StudentId & CourseId in StudentCourses table Insert into StudentCourses values(@StudentId, @CourseId) If required, we can very easily convert this into a stored procedure as shown below. Create procedure spInsertIntoStudentCourses @StudentName nvarchar(50), @CourseName nvarchar(50) as Begin Declare @StudentId int Declare @CourseId int Select @StudentId = Id from Students where StudentName = @StudentName Select @CourseId = Id from Courses where CourseName = @CourseName If (@StudentId is null) Begin Insert into Students values(@StudentName) Select @StudentId = SCOPE_IDENTITY() End If (@CourseId is null) Begin Insert into Courses values(@CourseName) Select @CourseId = SCOPE_IDENTITY() End Insert into StudentCourses values(@StudentId, @CourseId) End Use the following statement to execute the stored procedure Execute spInsertIntoStudentCourses 'Tom','C#'
Views: 93186 kudvenkat
before Insert Record in Database Check duplicate value| Insert |Search|Update in VB.NET with code
 
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before insert record in Database check duplicate value| insert |search|update in vb.net with source code.check duplicate value if not found then insert record in database.... #searching record in database #upadate record in database #How_to_Update_Record_in_database #how_to_Delete_record_in_database Original Credits: who made this video CODERBABA and YOUTUBE. ........................... my website https://goo.gl/yMhpe3 ............................. Thanks for watching these videos , hit like , subscribe our channel n yes don't forget to share with you friends ............................ Thanks for being with us make sure you share and stay with us with subscribing us - regards CODERBABA, codr baba, CODER BABA,Coder Baba,CoderBaba ?? ...................... Follow Us Socially ?? Facebook : https://goo.gl/tEWJ6X Instagram : https://goo.gl/2Z3nBs Twitter : https://goo.gl/Yrnxvd ............................ NO COPYRIGHT INFRINGEMENT IS INTENDED THIS PURELY FOR PROMOTING MYSELF AND SHOWING MY SKILLS AS YOUTUBE BLOGGER. THIS IS PURELY FOR NON PROFIT. ............................ LIKE ? SHARE ? SUBSCRIBE ............................ See you in next video, have a nice day. GOOD LUCK
Views: 13261 Coder Baba
insert data that not exist in second table in oracle sql.
 
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this tutorial in insert data that not exist in second table means you can select the who table. in oracle you have to learn about all concept and query that help full in features. #insert #oracletutorial #oracleprogramming #multiinsert
Views: 15 EasyWay Coding
How to use EXISTS / NOT EXISTS Logical Operator in SQL Server -  SQL Server / TSQL Tutorial Part 125
 
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What is Exists / Not Exists Logical Operator in SQL Server Exists returns TRUE if a subquery contains any rows. EXISTS is used when we want to test for the existence of rows specified by a subquery. 1) EXISTS will return TRUE if subquery contains any rows. That is right, if our subquery will return any rows and we have used EXISTS, the outer query is going to return all rows. 2) Use EXISTS and Join with SubQuery Link to scripts used in SQL Server / TSQL Tutorial Video http://www.techbrothersit.com/2016/06/how-to-use-exists-logical-operator-in.html Check out our website for Different SQL Server, MSBI tutorials and interview questions such as SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server 2016 DBA Tutorial SQL Server / TSQL Tutorial ( Beginner to Advance) http://www.techbrothersit.com/
Views: 8264 TechBrothersIT
Oracle EMPTY_BLOB Function
 
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https://www.databasestar.com/oracle-lob-functions/ The Oracle EMPTY_BLOB function is used to initialise a LOB column to an empty value. You can use it in an INSERT statement, an UPDATE statement, or with a variable in PL/SQL. The syntax of the EMPTY_BLOB function is: EMPTY_BLOB That’s it - no parameters. Why would you set a BLOB value to empty? It means you have initialised it but not given it a value. It’s good to know this function exists if you ever need to use it. For more information about the Oracle EMPTY_BLOB function, including all of the SQL shown in this video and the examples, read the related article here: https://www.databasestar.com/oracle-lob-functions/
Views: 195 Database Star
EXISTS Condition in Oracle Database
 
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#Exists oracle exists vs in, if exists in oracle, oracle not exists vs not in, difference between in and exists in oracle, case when exists oracle, oracle check if record exists, if not exists in oracle, oracle update where exists
Views: 42 Adam Tech
exists and not exists in SQL
 
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Explaining usage of exists and not exists
SQL Error ORA-00942 Table or View Does Not Exist in Oracle Database
 
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How to use Tab View (Data Dictionary) of Oracle Database to solve the SQL Error ORA-00942 Table or View Does Not Exist error in Oracle Database ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/ora-00942 Previous Tutorial ► ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ------------------------------------------------------------------------- ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 8212 Manish Sharma
Let's Learn SQL! Lesson 82 : EXIST and NOT EXIST Subqueries
 
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Explore SQL with Tom Coffing of Coffing Data Warehousing! In this lesson, learn about EXIST and NOT EXIST Subqueries!
SQL EXISTS VE NOT EXISTS KULLANIMI
 
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SQL: EXISTS Condition This SQL tutorial explains how to use the SQL EXISTS condition with syntax and examples. Click the Try It button next to an example to test it for yourself in our SQL Editor. Description The SQL EXISTS condition is used in combination with a subquery and is considered to be met, if the subquery returns at least one row. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.
Views: 84 gracia heys
MySQL Tutorial #12 in Hindi: SubQuery(Nested Query) with EXISTS and NOT EXISTS Clause
 
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MySQL Tutorial #12 in Hindi: SubQuery(Nested Query) with EXISTS and NOT EXISTS Clause - Solved Examples MySQL tutorial for Beginners MySQL Installation Guide How to Install MySQL on windows 10
Difference between IN and EXISTS clause in database
 
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Difference between IN and EXISTS clause in database
Views: 789 Techie Savy
SQL Tutorial - 13: Inserting Data Into a Table From Another Table
 
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In this tutorial we'll learn to use the INSERT Query to copy data from one table into another.
Views: 263916 The Bad Tutorials
Java & MySQL - Check if a value already exists
 
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Easy tutorial on how to check if a value already exists in the database.
Views: 29920 Mozoran
IN VS EXISTS VS JOIN, performance
 
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This video demonstrates the performance effects of using an exists clause instead of an IN clause, also it shows how we can update a simple sub query having an IN clause with an EXISTS or JOIN statement. It also shows that joining would consider the null data, where as an IN clause would neglect null values. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : union and union all : https://youtu.be/n9FqQOd8liY char and varchar2 : https://youtu.be/039qzwjWf4k replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 13124 Kishan Mashru
Merge: Databases for Developers #17
 
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Sometimes when adding rows to your database need update-if-exists, insert-if-not-exists logic. Aka an upsert. You could write this as separate update and insert statements. But there is an easier way: Merge! Watch this video for an overview of how merge works. Further reading: Merge documentation: https://docs.oracle.com/en/database/oracle/oracle-database/18/sqlrf/MERGE.html Delete rows not in the source using merge: https://technology.amis.nl/2006/10/14/have-merge-remove-records-from-target-that-are-not-in-the-source-oracle-10g/ Take the course: https://devgym.oracle.com/pls/apex/dg/class/databases-for-developers-next-level.html Need help with SQL? Ask us over on AskTOM: https://asktom.oracle.com Twitter: https://twitter.com/ChrisRSaxon Daily SQL Twitter tips: https://twitter.com/SQLDaily All Things SQL blog: https://blogs.oracle.com/sql/ ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 962 The Magic of SQL
SQL tutorial 60: SQL View in Oracle Database By Manish Sharma RebellionRider
 
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SQL View in Oracle Database. In this tutorial you will learn how to create a vie as well as how to replace a view along with the examples of all the DML e.g. DESCRIBE, SELECT, UPDATE, INSERT and Delete on view by Manish Sharma RebellionRider ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/sql-view-in-oracle-database Previous Tutorial ► Tut 5: SELECT statement http://youtu.be/f_mVBVgnqmM ------------------------------------------------------------------------- ►►►Help Me In Getting A Job◄◄◄ ►Help Me In Getting A Good Job By Connecting With Me on My LinkedIn and Endorsing My Skills. All My Contact Info is Down Below. You Can Also Refer Me To Your Company Thanks ------------------------------------------------------------------------- Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=kb4rc1 -------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! -------------------------------------------------------------------------- Amazon Wishlist: http://bit.ly/wishlist-amazon ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at [email protected] Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 43887 Manish Sharma
Oracle Database11g tutorials 14 : How to CREATE TABLE using sql developer and command prompt
 
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Oracle Database11g tutorials 14 How to Create table using command prompt and Create table using sql developer Blog Link http://bit.ly/1TkY4Oe Time Line 0:25 Introduction of Tables in Database 1:03 What is Create Table (Introduction of create table) 1:30 Syntax of Create Table 2:08 How to create table using Command Prompt 4:55 How to create table using SQL Developer Links for Oracle Database tutorials 4: database connectivity using SQL developer and command prompt http://youtu.be/wSqoXRlXDUU You can have indepth knowledge about SQL create table here http://www.rebellionrider.com/sql-create-table.html Tool used in this tutorial is command prompt. This tutorial series is part of SQL expert exam certification training. if you are preparing for SQL certification you can use my tutorials. This SQL Tutorial is a part of free training. Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=j7eYO7 Contacts E-Mail [email protected] Twitter https://twitter.com/rebellionrider Instagram http://instagram.com/rebellionrider Facebook. https://www.facebook.com/imthebhardwaj Linkedin. http://in.linkedin.com/in/mannbhardwaj/ Thanks for linking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com Today in this oracle database tutorial we will see How to CREATE A TABLE. if we have to define a table in layman language then we can say that Tables are just a collection of Rows and Columns but In RDBMS tables are database objects which help in organizing data into ROWS and COLUMNS. We can also say that SQL tables are kind of data structure which are used by database for efficient storage of data. To create a table in our database we use SQL CREATE TABLE command. SQL CREATE TABLE is a type of DATA DEFINITION LANGUAGE also known as DDL. To Create a table in your schema you will require CREATE TABLE system privilege. In our future videos we will see what are system and object privileges and how to grant them to a user. Today for this video we will be using Sample schema HR which already has all the necessary privileges. Ohk Let's see the syntax. CREATE TABLE table name ( column name1 Data-Type(size), column name2 Data-Type(size), ..... ); CREATE TABLE is an oracle reserved word or say an Oracle key word whereas There are 3 different ways of creating a table in Oracle database. Creating a table using Command Line Interface (CLI) in Oracle database For demonstrating how to create table in oracle database using CLI, I'll be using Command prompt. Thats how we create table using command prompt. you can check your table structure by DESCRIBE command for that just write DESC and your table name. Like this Another way of creating a table is by using Graphic user interface (GUI) in Oracle database To demonstrate how to create table using GUI we will use SQL developer. Lets open our SQL developer I am connected to HR schema if you do not know how to create a connection to database using SQL developer please watch my oracle database tutorial 4 that explains database connectivity using SQL developer and command prompt. Link for this video is in the description below. So lets create a table. Creating a table using SQL developer is very easy we do not have to fire any query here. Let's start First of all right click on your connection in which you want to create a table and choose schema browser. This will open a separate schema browser pane or you can expend your connection by clicking this + sign and then right click on table and choose New Table. However I prefer working with schema browser so let's skip to schema browser pane here from the first drop-down list you can choose connection name and in the second drop down list you can choose what database objects you want to work with we want to create a table thus I'll choose table and then click this arrow here and choose option for new table Ok we have created a table wizard first of all give a unique name to your table and add some column as well. For this, click the green plus button. Now we already have a column so give it some name. Also choose a datatype from the list and specify any size you can check this not null column if in case you want to make this a mandatory column you can also specify default value and constraint If you want to make this column a primary key you can click here In my future video i'll show you what are these constraints and different ways of applying them on a column in a table. for this video we will concentrate on create table only so when you are done with all your columns click ok Thats your table You can double click on your table here and can see its structure. Thats it
Views: 186311 Manish Sharma
Part-11 check if record exists before insert cSharp sql
 
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check if record exists before insert cSharp sql
Views: 32378 code factory 2016
SQL Server except operator
 
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sql except example sql except operator example sql server except example sql server except order by sql server except clause SQL Server except operator In this video we will discuss SQL Server except operator with examples. EXCEPT operator returns unique rows from the left query that aren’t in the right query’s results. Introduced in SQL Server 2005 The number and the order of the columns must be the same in all queries The data types must be same or compatible This is similar to minus operator in oracle Let us understand this with an example. SQL Script to create the tables Create Table TableA ( Id int primary key, Name nvarchar(50), Gender nvarchar(10) ) Go Insert into TableA values (1, 'Mark', 'Male') Insert into TableA values (2, 'Mary', 'Female') Insert into TableA values (3, 'Steve', 'Male') Insert into TableA values (4, 'John', 'Male') Insert into TableA values (5, 'Sara', 'Female') Go Create Table TableB ( Id int primary key, Name nvarchar(50), Gender nvarchar(10) ) Go Insert into TableB values (4, 'John', 'Male') Insert into TableB values (5, 'Sara', 'Female') Insert into TableB values (6, 'Pam', 'Female') Insert into TableB values (7, 'Rebeka', 'Female') Insert into TableB values (8, 'Jordan', 'Male') Go Notice that the following query returns the unique rows from the left query that aren’t in the right query’s results. Select Id, Name, Gender From TableA Except Select Id, Name, Gender From TableB To retrieve all of the rows from Table B that does not exist in Table A, reverse the two queries as shown below. Select Id, Name, Gender From TableB Except Select Id, Name, Gender From TableA You can also use Except operator on a single table. SQL script to create tblEmployees table Create table tblEmployees ( Id int identity primary key, Name nvarchar(100), Gender nvarchar(10), Salary int ) Go Insert into tblEmployees values ('Mark', 'Male', 52000) Insert into tblEmployees values ('Mary', 'Female', 55000) Insert into tblEmployees values ('Steve', 'Male', 45000) Insert into tblEmployees values ('John', 'Male', 40000) Insert into tblEmployees values ('Sara', 'Female', 48000) Insert into tblEmployees values ('Pam', 'Female', 60000) Insert into tblEmployees values ('Tom', 'Male', 58000) Insert into tblEmployees values ('George', 'Male', 65000) Insert into tblEmployees values ('Tina', 'Female', 67000) Insert into tblEmployees values ('Ben', 'Male', 80000) Go Except operator on a single table Select Id, Name, Gender, Salary From tblEmployees Where Salary ]= 50000 Except Select Id, Name, Gender, Salary From tblEmployees Where Salary ]= 60000 Order By clause should be used only once after the right query Select Id, Name, Gender, Salary From tblEmployees Where Salary ]= 50000 Except Select Id, Name, Gender, Salary From tblEmployees Where Salary ]= 60000 order By Name Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/sql-server-except-operator.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/adsbygoogle-window.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 43062 kudvenkat
Subqueries in sql   Part 59
 
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In this video we will discuss about subqueries in sql server. Let us understand subqueris with an example. Please create the required tables and insert sample data using the script below. Create Table tblProducts ( [Id] int identity primary key, [Name] nvarchar(50), [Description] nvarchar(250) ) Create Table tblProductSales ( Id int primary key identity, ProductId int foreign key references tblProducts(Id), UnitPrice int, QuantitySold int ) Insert into tblProducts values ('TV', '52 inch black color LCD TV') Insert into tblProducts values ('Laptop', 'Very thin black color acer laptop') Insert into tblProducts values ('Desktop', 'HP high performance desktop') Insert into tblProductSales values(3, 450, 5) Insert into tblProductSales values(2, 250, 7) Insert into tblProductSales values(3, 450, 4) Insert into tblProductSales values(3, 450, 9) Write a query to retrieve products that are not at all sold? This can be very easily achieved using subquery as shown below. Select [Id], [Name], [Description] from tblProducts where Id not in (Select Distinct ProductId from tblProductSales) Most of the times subqueries can be very easily replaced with joins. The above query is rewritten using joins and produces the same results. Select tblProducts.[Id], [Name], [Description] from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId where tblProductSales.ProductId IS NULL In this example, we have seen how to use a subquery in the where clause. Let us now discuss about using a sub query in the SELECT clause. Write a query to retrieve the NAME and TOTALQUANTITY sold, using a subquery. Select [Name], (Select SUM(QuantitySold) from tblProductSales where ProductId = tblProducts.Id) as TotalQuantity from tblProducts order by Name Query with an equivalent join that produces the same result. Select [Name], SUM(QuantitySold) as TotalQuantity from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId group by [Name] order by Name From these examples, it should be very clear that, a subquery is simply a select statement, that returns a single value and can be nested inside a SELECT, UPDATE, INSERT, or DELETE statement. It is also possible to nest a subquery inside another subquery. According to MSDN, subqueries can be nested upto 32 levels. Subqueries are always encolsed in paranthesis and are also called as inner queries, and the query containing the subquery is called as outer query. The columns from a table that is present only inside a subquery, cannot be used in the SELECT list of the outer query. Next Video: What to choose for performance? Queries that involve a subquery or a join Text version of the video http://csharp-video-tutorials.blogspot.com/2013/01/subqueries-in-sql-part-59.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-59-subqueries-in-sql-server.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 214967 kudvenkat
Oracle Database 12c Tutorial  2: How To Unlock HR schema in Oracle Database 12c
 
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Learn how to unlock HR user / Schema in Oracle Database 12c. Step by step procedure of unlocking the HR Schema in Oracle 12c By Manish Sharma a.k.a RebellionRider ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/how-to-unlock-hr-user-in-oracle-database-12c Previous Tutorial ► Tut 60: How To Install 12c On Windows 7: http://youtu.be/T-rCbe1MMG4 ------------------------------------------------------------------------- ►►►Help Me In Getting A Job◄◄◄ ►Help Me In Getting A Good Job By Connecting With Me on My LinkedIn and Endorsing My Skills. All My Contact Info is Down Below. You Can Also Refer Me To Your Company Thanks ------------------------------------------------------------------------- Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=kb4rc1 -------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! -------------------------------------------------------------------------- Amazon Wishlist: http://bit.ly/wishlist-amazon ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at [email protected] Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 87578 Manish Sharma
SQL  subqueries - Lesson 8 (EXISTS, NOT EXISTS, ALL, ANY)
 
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Subqueries are nested queries with another main query. Learn how to use subqueries as part of main queries and with aggregate functions using EXISTS | NOT EXISTS, ANY | ALL Links to all SQL Lessons: SQL Lesson 8 - Subqueries https://youtu.be/7DxuPcx-mRI SQL Lesson 6 - JOIN (INNER, LEFT, RIGHT) https://youtu.be/_NrRRzCjFGE SQL Lesson 5 - Constraints (Default, Primary Key, Foreign Key …) https://youtu.be/BtmHISzqYjQ SQL Lesson 4 - GROUP BY, HAVING, String Functions https://youtu.be/zClzY2fE2fA SQL Lesson 3 - Aggregate Functions SUM, AVG etc. https://youtu.be/w1F0UgsYfis SQL Lesson 2 - Logical, Conditional and Arithmetic Operators https://youtu.be/OpRO1atoe84 SQL Lesson 1 - Basics of SQL Queries https://youtu.be/pJCyTBkoIKA
Views: 498 masti supreme
SQL in Oracle 11g Tutorial #8: Three way to Insert record in Table(Insert statement)
 
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SQL in Oracle 11g Tutorial #8: Three way to Insert record in Table(Insert statement). Thanks for Watching my Channel “Learn TechToTech”. Please subscribe my channel for getting first updates after uploading video.Social Media pages of Channel are: 1. My Website : www.learnfromrakesh.com 2. My Twitter: https://twitter.com/LearnTechtotech 3. Facebook Page: https://www.facebook.com/LearnTechToTech 4. Blogger : https://learntechtotech.blogspot.in/ 5. Google+ : https://learntechtotech.blogspot.in/ 6. Pinterest : https://in.pinterest.com/LearnTechToTech/ 7. LinkedIn: https://www.linkedin.com/in/Learntechtotech/ Playlist of Different Technology: 1. Operating System : https://goo.gl/q6SfrW 2. Python Programming Language : https://goo.gl/L8b5dc 3. C Language : https://goo.gl/SwvDu9 4. C language for Placement: https://goo.gl/AaQBa4 5. Java: https://goo.gl/M8F2uy 6. MySql : https://goo.gl/vdJbHQ 7. Android Mobile Application Development: https://goo.gl/M6woaT 8. Kotlin Programming Language : https://goo.gl/GXE5cd 9. Go Programming: https://goo.gl/Ua3xYW 10. Internet of Things(IoT): https://goo.gl/f2afkY 11. Oracle 11g : https://goo.gl/zds8r2 12. C++ : https://goo.gl/C1psMT
Views: 53 Learn TechToTech
How to Resolve Oracle SQL Parent Key Not Found (ORA-02291)
 
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In this video, we’ll explain what the ORA-02291 “parent key not found” error is, see an example, and look at how to resolve it. This error usually happens when we try to insert data into a table. It looks like this: Error is: ORA-02291: integrity constraint (constraint_name) violated - parent key not found So what does this error mean? It means we’re trying to insert data into a child table, and there is no related record in the parent table. If a foreign key has been set up to enforce this relationship, there needs to be a parent to insert a child that refers to it. Watch the video to see an example of this error as well as how to resolve it. For more information on Oracle SQL, refer to the Database Star website here: https://www.databasestar.com/
Views: 4184 Database Star
SSIS Tutorial Part 60-Perform Upsert  (Update/Insert  SCD1) by Lookup Transformation in SSIS Package
 
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SSIS Tutorial Scenario: Let's say we have to load a dimension table from text file. Our business Key is SSN. We need to insert new records depending upon values of SSN column, If any new then we need to insert this records. If SSN already existing in Table then we need to find out if any other column is changed from Source columns values. If that is true then we have to update those values. What we will learn in this video How to Read the data from Flat file in SSIS Package How to perform Lookup to Find out Existing or Non Existing Records in Destination Table From Source How to Insert new Records by using OLE DB Destination How to update existing Records by using OLE DB Command Transformation in SSIS Package Link to the blog post for this video with script if used http://sqlage.blogspot.com/2015/05/perform-upsert-updateinsert-scd1-by.html Check out our Full Step by Step SQL Server Integration Services(SSIS) Tutorial http://www.techbrothersit.com/2014/12/ssis-videos.html
Views: 35608 TechBrothersIT
Part 12   Can we join two tables without primary foreign key relation
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/09/part-12-can-we-join-two-tables-without.html Can we join two tables without primary foreign key relation Yes, we can join two tables without primary foreign key relation as long as the column values involved in the join can be converted to one type. ID column in Departments table is not the primary Key and DepartmentId column in Employees table is not the foreign key. But we can still join these tables using ID column from Departments table and DepartmentId column from Employees table, as both the columns involved in the join have same data type i.e int. Select Employees.Name as EmployeeName, Departments.Name as DepartmentName from Employees join Departments on Departments.ID = Employees.DepartmentId The obious next question is, if primary foreign key relation is not mandatory for 2 tables to be joined then what is the use of these keys? Primary key enforces uniqueness of values over one or more columns. Since ID is not a primary key in Departments table, 2 or more departments may end up having same ID value, which makes it impossible to distinguish between them based on the ID column value. Foreign key enforces referential integrity. Without foreign key constraint on DepartmentId column in Employees table, it is possible to insert a row into Employees table with a value for DepartmentId column that does not exist in Departments table. The following insert statement, successfully inserts a new Employee into Employees table whose DepartmentId is 100. But we don't have a department with ID = 100 in Departments table. This means this employee row is an orphan row, and the referential integrity is lost as result Insert into Employees values (8, 'Mary', 'Female', 80000, 100) If we have had a foreign key constraint on DepartmentId column in Employees table, the following insert statement would have failed with the following error. Msg 547, Level 16, State 0, Line 1 The INSERT statement conflicted with the FOREIGN KEY constraint. The conflict occurred in database "Sample", table "dbo.Departments", column 'ID'.
Views: 122973 kudvenkat
Oracle SQL Tutorial 16 - Parent Child Relationships
 
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So far in this series we have discussed database design, creating tables, and constraints. We've brought up the concept of foreign keys, but we have not explained how to create them. That is the goal of this video and the upcoming videos. We want to study those foreign keys! Let's make them not so foreign. Let's learn the proper way to define a foreign key. As a reminder, a foreign key is a column that references a column of another table. The column it references must either be a primary key, or have the UNIQUE constraint. This means that every value inside of the column that is labeled as a foreign key, there must be that value in some row of the referenced column. As an example, imagine that we have the users table, and we have a table service_requests. We could have a column in the service_request that references a column in the users table. Usually this would be the primary key that is referenced, but there is nothing stopping you from referencing a unique column. Just for fun, let's go through an example using the username column. If we have a service_requests table, every single row within the table is going to be what some would consider an instance of a service_request. This means that the table columns are like the blueprint for what a service request looks like and then each row is an individual service request. If we have one of the columns labeled as a foreign key to the username of the users table, what does that mean practically? It means that for a single row, the value for that column must be a value that exists in the users table. We could have a service_request submitted by a user with the username of Yoloswagman. This means that there must be a row inside of the users table that has the value Yoloswagman for the username column. This brings up the concept of parent and child relationships. Yoloswagman in this situation is the parent, and his service request is the child. When we draw it out, it makes sense why a primary key must be UNIQUE. If we had two Yoloswagmans, the child would not know which column is the parent. The same applies if we were using IDs and we had So remember, always reference a primary key or a column with the UNIQUE constraint. Now, I have a question for you. Do foreign keys automatically have the UNIQUE constraint, just like primary keys? The answer is no. A parent row can have many child rows. It makes sense because the user could submit multiple service requests. Can we force the column to be unique? Absolutely. If that was the case, the user could only make one service request. Another question. Do foreign keys automatically have the NOT NULL constraint, just like primary keys? The answer is no. Essentially what this means is that a child could be created with no parent. Can we force the column to be NOT NULL? Absolutely. It is ok in some situations to allow the row to be null, but in this situation it makes no sense. It would be wise for us to add that constraint ourselves. So now that you understand some more differences between primary and foreign keys and parent child relationships, take all of these questions into consideration when you are creating foreign keys. In the next video, we are going to start a small project that is going to require multiple tables. We'll take a video to design our structure and then we'll get to creating those foreign keys in Oracle SQL Developer. Stick around and if you like these videos please be a serious supporter and subscribe to my channel. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ HELP ME! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 14235 Caleb Curry
JAVA - How To Create Login And Register Form With MySQL DataBase In Java Netbeans
 
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Java Make SignIn And SignUp Form With MySQL DataBase The Design Part - https://youtu.be/XAowXcmQ-kA source code: https://1bestcsharp.blogspot.com/2018/05/java-login-and-register-form-with-mysql-database.html ------------------ Check out my Java Projects! -------------------- ▶ Inventory Management System - http://bit.ly/Java_Inventory ▶ Students Information System - http://bit.ly/Students_System ▶ Contacts Management System - http://bit.ly/Contact_Project ▶ All My Programming Projects Here - http://bit.ly/2HrU8hK ▶ My Source Code Store Here - http://bit.ly/2OsC0TU -------------------------- JAVA COURSE ----------------------------- ▶ master Java core development step-by-step - http://bit.ly/2HXSuAn ▶ TRY PLURALSIGHT FREE FOR 10 DAYS ( affiliate link ): http://bit.ly/2CeLJtc -------------------------------------------------------------------- visit our blog https://1bestcsharp.blogspot.com/ facebook: https://www.facebook.com/1BestCsharp twitter: https://www.twitter.com/1BestCsharp_ subscribe: http://goo.gl/nRjPKk programming projects with source code: http://1bestcsharp.blogspot.com/p/programming-projects.html C# And Java Programming Books http://1bestcsharp.blogspot.com/2015/04/c-and-java-programming-books.html ******************************************************************** in a previous java tutorial we did a login and register form design ( video link: https://youtu.be/XAowXcmQ-kA ), and in this one will see how to connect the login and signup form with a mysql database to do that you need to download mysql connector, watch tutorial from here: https://www.youtube.com/watch?v=zM7oe2_S-jY and add it to your project we will ceate a class (MyConnection) to connect our login and register forms with mysql database in the register form wi will create a function (checkUsername) to check if the username you want to register is already exists in the database table what we will check when the user click on the register button: - if the username jtextfield is empty - if the password jtextfield is empty - if the retype_password text is equal to the password text - if the username already exists in the database using the "checkUsername" function - if the jdatechooser is empty in the login fom it's simple; the user enter his login and password and click on the login button, and all we have to do is to check if a user with this username and password already exists on the database other videos: Create Login Form In Java With MySQL Database Part 1 https://www.youtube.com/watch?v=7sNYhlBz9xo Java And MySQL - Populate JTable Depending On a JCombobox Value In Java https://www.youtube.com/watch?v=9NO0AHxvgio Connect Java To MySQL Database https://www.youtube.com/watch?v=zM7oe2_S-jY Bind a JCombobox With Mysql Database Values https://www.youtube.com/watch?v=23-90p2xceg Search Values From MySQL Database And Set It Into JTextfield https://www.youtube.com/watch?v=uuhEb0k3vVE bind jtable from mysql database in netbeans https://www.youtube.com/watch?v=G4JeKZ6nDUI Bind JTable From MySQL DataBase Using ArrayList https://www.youtube.com/watch?v=2d4i6BXQPFA Populate JCombobox Depending On Another JCombobox https://www.youtube.com/watch?v=O_aSNfGSD20 Populate JCombobox From MySQL With Key And Value https://www.youtube.com/watch?v=gheAMX-MGN8 How To Use Stored Procedure In Java And MySQL https://www.youtube.com/watch?v=pux1p52ZaQw Insert Update Delete Data In Database https://www.youtube.com/watch?v=uKEgKETRCzE How To Bind a HashMap From DataBase In Java https://www.youtube.com/watch?v=WAIcC3pl94o display Image From database To jtable https://www.youtube.com/watch?v=-ekqLViEvHg share this video: https://youtu.be/i5UG6ACtnEg
Views: 388246 1BestCsharp blog
Oracle SQL Tutorial 15 - How to Add Primary Key Constraints
 
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The goal of this video is to take the CREATE TABLE statement we have and walk through the different ways to create primary keys. This and foreign keys are the most common constraints, so we need to make sure that you have this one down. Once we have a more complex database design with multiple tables, we will learn the proper way to create foreign keys. For now, I am going to keep all of our constraints at the column level, unnamed. The only exception is the primary key, because that is what we are focusing on in this video. The first way to create the primary key is at the column level, unnamed. The primary key is very important because it what we use to distinguish rows from one another. Every table you create is going to need a primary key, and I suggest putting a lot of effort into making sure your keys are set up correctly and organized. --Delete the table if needed: DROP TABLE users; CREATE TABLE users( user_id NUMBER PRIMARY KEY, username VARCHAR2(50 CHAR) NOT NULL UNIQUE ) The next way is at the column level, but named: --Delete the table: DROP TABLE users; CREATE TABLE users( user_id NUMBER CONSTRAINT users_pk PRIMARY KEY, username VARCHAR2(50 CHAR)NOT NULL UNIQUE ) The general naming convention here is the table name followed by an underscore, followed by pk for primary key. Finally, the third way, which is at the table level, is the way we are going to create our primary key: --Delete the table: DROP TABLE users; CREATE TABLE users( user_id NUMBER, username VARCHAR2(50 CHAR) NOT NULL UNIQUE, CONSTRAINT users_pk PRIMARY KEY (user_id) ) Now, once you've created these constraints, you can use Oracle SQL Developer to find these constraints. Open your databases in the connections tab and find the table in the Tables folder. Double click your table and travel to the Constraints tab. You can tell here that the UNIQUE constraint still exists in this table, but it has a pretty disgusting name. It kind of wants to make me puke. Referencing that constraint in the future with that wacky name would be a burden. Engrave these three options in your head so that you can use any of them whenever you need and can read other peoples' code. Thank you for sticking with the series thus far. In the next video, we will be…doing something. See you then! :) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me on Patreon! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 16856 Caleb Curry
Pegadinha da Semana Ep. 17 P1 - SQL Exists e Not Exists - Prof. Eduardo Neves 2015
 
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Esta é uma amostra em vídeo de um Curso completo sobre o tema. Mais informações em: http://www.ProvasdeTI.com.br/ Confira também nossa plataforma de simulados para quem está se preparando para Concursos Públicos ou Certificações na área de TI: http://www.Gabaritou.com.br/
Views: 1447 Portal Provas
create and use function in sql. not exist in SQL PART 8
 
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sql tutorial for beginners. not exists function in sql. part 8 create and use function in sql. not exists sql statement, how to write an sql statement of the records of a table where not exist in other table (child table) in sql statement. sql tutorial for beginners you can use this statement in sql view, sql stored procedure, sql function. ~~~~~~~~~~~~~ Subscriber will be notified when I will upload new tutorials in future. Many more new tutorials coming soon, so stay tuned! https://www.youtube.com/swiftlearn ~~~~~~~~~~~~~ You can also know all the programming techniques, and bug fixing, error solution in my channel Swift learn. The main topics of this channel are c#.net, asp.net, WCF, sql server, crystal report, RDLC report, HTML, CSS, javascript, Android etc. ~~~~~~~~~~~~~ Share this video with anyone if you think as useful. Please leave any suggestions for future tutorials in the comment section below. ~~~~~~~~~~~~~ Connect with me https://www.facebook.com/groups/swiftlearn/ All playlist c# tutorial for beginners Swift Learn https://www.youtube.com/playlist?list=PLINPYKVRUHyXoPn0-4NIdFn8RrQQDdAki c# linq to sql tutorial Swift Learn https://www.youtube.com/playlist?list=PLINPYKVRUHyVsic1g2CUn2pR5aKjNd3Nc asp.net tutorial for beginners full Swift Learn https://www.youtube.com/playlist?list=PLINPYKVRUHyUjmHrYfAq1l8pe5eXhkZqF crystal report c# in sql Swift Learn https://www.youtube.com/playlist?list=PLINPYKVRUHyWao6CC3Eu0srQxJjgkfLsm SQL Tutorial for beginners full Swift Learn https://www.youtube.com/playlist?list=PLINPYKVRUHyVOv6mx6xU7HEgGcfLk4Kmz
Views: 120 Swift Learn
How To Check If Column Exists for a Table Or View in Database in SQL Server - SQL Server Tutorial
 
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On daily basis, we come across this scenario when we have to find out if a column exists for a Table or View in Database. Specially if we are debugging SQL Server Reports/An application, we take a column name or part of it and want to know that from which table this column is used. We can query INFORMATION_SCHEMA.COLUMNS view to get this information. blog post link for scripts used in this video http://sqlage.blogspot.com/2014/01/tsql-how-to-check-if-column-exists-for.html
Views: 5112 TechBrothersIT
082-Oracle SQL 12c: Creating Views part 2
 
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تعلم اوراكل حتى الاحتراف تعلم اوراكل من الصفر EXAM 1Z0-061 EXAM 1Z0-071
Views: 1485 khaled alkhudari
Oracle Database Tutorial 9: The "and" and "or" Operator In Sql
 
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sql series playlist ===)https://www.youtube.com/watch?v=-ixZ4YQ4Uco&list=PL7nQsQekG89yNvQUtbPa4gLeZlprYUr54 SQL Select Top SQL Min and Max SQL Count, Avg, Sum SQL Like SQL Wildcards SQL In SQL Between SQL Aliases SQL Joins SQL Inner Join SQL Left Join SQL Right Join SQL Full Join SQL Self Join SQL Union SQL Group By SQL Having SQL Exists SQL Any, All SQL Select Into SQL Insert Into Select SQL Null Functions SQL Comments SQL Database SQL Create DB SQL Drop DB SQL Create Table SQL Drop Table SQL Alter Table SQL Constraints SQL Not Null SQL Unique SQL Primary Key SQL Foreign Key SQL Check SQL Default SQL Index SQL Auto Increment SQL Dates SQL Views SQL Injection SQL Hosting SQL References MySQL Functions SQL Server Functions MS Access Functions Oracle Functions SQL Operators SQL Data Types SQL Quick Ref SQL Quiz SQL Quiz SQL AND, OR and NOT Operators The SQL AND, OR and NOT Operators The WHERE clause can be combined with AND, OR, and NOT operators. The AND and OR operators are used to filter records based on more than one condition: The AND operator displays a record if all the conditions separated by AND is TRUE. The OR operator displays a record if any of the conditions separated by OR is TRUE. The NOT operator displays a record if the condition(s) is NOT TRUE. sql multiple or sql like not in operator in sql sql order by sql update sql not in sql where not equal
Subqueries: Databases for Developers #11
 
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In SQL you can base queries on the results of other queries. This video explains the various types of subquery and their uses, covering: - Inline views - IN & EXISTS - Common table expressions/subquery factoring/with clause - Scalar subqueries Take the course; Databases for Developers: Next Level https://blogs.oracle.com/academy/take-your-sql-skills-to-the-next-level-with-this-free-online-10-part-tutorial Further reading: About Queries and Subqueries: https://docs.oracle.com/en/database/oracle/oracle-database/18/sqlrf/About-Queries-and-Subqueries.html Using Subqueries: https://docs.oracle.com/en/database/oracle/oracle-database/18/sqlrf/Using-Subqueries.html Need help with SQL? Ask us over on AskTOM: https://asktom.oracle.com Twitter: https://twitter.com/ChrisRSaxon Daily SQL Twitter tips: https://twitter.com/SQLDaily All Things SQL blog: https://blogs.oracle.com/sql/ ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 1881 The Magic of SQL
Tutorial#24 Any operator in sql  | 100% guarantee you will learn something new
 
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Explaining How to use Any operator in Oracle SQL or Any comparison condition using SQL or Understanding Set Comparison Operator in SQL or how to use Any Comparison operator in Details or Any comparison operators in Oracle with examples In this series we cover the following topics: SQL basics, create table oracle, SQL functions, SQL queries, SQL server, SQL developer installation, Oracle database installation, SQL Statement, OCA, Data Types, Types of data types, SQL Logical Operator, SQL Function,Join- Inner Join, Outer join, right outer join, left outer join, full outer join, self-join, cross join, View, SubQuery, Set Operator. its perfect videos series sql tutorials for starters You may get the answer to the following question in this series sql any vs all difference between any and all in sql sql some operator group by sql sql server any all in sql server exists operator in sql sql some vs any in operator in sql sql any vs in any operator in oracle SQL what is any operator operator in sql like operator in sql what is all operator Follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/lrnwthr/ Twitter: https://twitter.com/LrnWthR
Views: 128 EqualConnect Coach
ALL, ANY and SOME Comparison Conditions in SQL
 
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This video demonstrates the use of the ALL, ANY and SOME comparison conditions in SQL. You don't see them used in Oracle very often, probably because there are functionally equivalent statements that are in more common use instead. For more information see: https://oracle-base.com/articles/misc/all-any-some-comparison-conditions-in-sql Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Jorge Rimblas (actually, his children :) ) Blog: http://rimblas.com/blog/ Twitter: https://twitter.com/rimblas Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 13566 ORACLE-BASE.com
Null value in oracle
 
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this video describes null concept in oracle. join the group and share your knowledge and ask your doubts. https://www.facebook.com/groups/940425699338535/
Curso Oracle Sql - Video 21 - Subconsultas
 
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Subconsultas. Operador Exist y Not Exist. Cláusula With. Funciones de agrupación en subconsultas.
Базы данных для начинающих. Внутренние индексы SQL таблицы. Таблицы WITHOUT ROWID в SQLite.
 
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Помощь проекту: WMR: R288272666982 WMZ: Z293550531456 Яндекс.Деньги: 410011531129223 Рубрика SQLite на сайте: http://zametkinapolyah.ru/zametki-o-mysql/sqlite/ Текстовая версия: http://zametkinapolyah.ru/zametki-o-mysql/chast-11-7-indeksy-v-bazax-dannyx-sqlite-indeksaciya-tablic-v-sqlite3-algoritm-b-dereva-v-bazax-dannyx.html Паблик блога в ВК: https://vk.com/zametkinapolyah Тематическая группа в ВК: https://vk.com/zametki_bd -- Столбец ROWID или внутренние индексы таблицы в базе данных SQLite -- У каждой таблицы базы данных SQLite по умолчанию есть внутренний индекс, который называет ROWID. Иногда этот индекс совпадает с первичным ключом таблицы PRIMARY KEY, иногда не совпадает, но ROWID есть у каждой таблицы. Если говорить просто и понятно, то ROWID – это дополнительный столбец, который есть у любой таблицы SQLiteи является индексом для данной таблицы. -- Помимо того, что ROWID – это индекс, это еще один способ поддержание целостности данных. Давайте разберемся с индексом ROWID в базах данных SQLite. ROWID–это 64-разрядное число, которое однозначно идентифицирую любую строку в базе данных SQLite. -- Создадим таблицу без индексов и наполним ее данными CREATE TABLE table1(a, b ,c ,d); INSERT INTO table1 (a, b, c , d) VALUES (1, 2, 3, 4); INSERT INTO table1 (a, b, c , d) VALUES (1, 2, 3, 4); INSERT INTO table1 (a, b, c , d) VALUES (1, 2, 3, 4); INSERT INTO table1 (a, b, c , d) VALUES (1, 2, 3, 4); -- посмотрим содержимое таблицы SELECT*FROM table1; -- SQLite не показывает столбец ROWID, если не обращаться к нему по имени, давайте изменим наш запрос SELECT SELECT rowid, a, b, c, d FROM table1; SELECT rowid, a FROM table1; -- Чтобы первичный ключ совпадал с ROWID, нужно создать таблицу следующим образом CREATE TABLE table1(x INTEGER PRIMARY KEY ASC, y, z); CREATE TABLE table2(x INTEGER, y, z, PRIMARY KEY(x ASC)); CREATE TABLE table3(x INTEGER, y, z, PRIMARY KEY(x DESC)); -- Обратите внимание: если столбец PRIMARY KEY объявить как-нибудь по-другому, то значения PRIMARY KEY и ROWID совпадать не будут. -- Таблицы WITHOUT ROWID в базах данных SQLite, таблицы без внутренних индексов -- В SQLite можно создавать таблицы без столбца ROWID, то есть без внутреннего индекса. Такой подход несет незначительные плюсы: иногда это ускоряет выборку данных из базы данных и немного уменьшает объем базы данных. Если вы решили создать таблицу без ROWID в SQLite, то вам необходимо сделать две вещи: во-первых, у таблицы должен быть обязательно первичный ключ, во-вторых, вам необходимо использовать ключевую фразу WITHOUT ROWID. CREATE TABLE IF NOT EXISTS wordcount( word TEXT PRIMARY KEY, cnt INTEGER ) WITHOUT ROWID; INSERT INTO wordcount (word, cnt) VALUES ('word1', 2); INSERT INTO wordcount (word, cnt) VALUES ('word2', 5); INSERT INTO wordcount (word, cnt) VALUES (NULL, 5); CREATE TABLE IF NOT EXISTS wordcount1( word TEXT PRIMARY KEY, cnt INTEGER ); INSERT INTO wordcount1 (word, cnt) VALUES (NULL, 5); -- Теперь у таблицы не будет столбца ROWID. Еще одной особенностью таблиц WITHOUT ROWID является то, что ограничение уровня столбца AUTOINCREMENT работать не будет. Первичный ключ таблицы WITHOUT ROWID ни при каких обстоятельствах не может иметь значение NULL, если вы попробуете добавить NULL в столбец PRIMARY KEY таблицы WITHOUT ROWID, то SQLite выдаст ошибку. Из-за особенностей работы таблиц WITHOUT ROWID, разработчики SQLiteрекомендуют использовать такие таблицы в тех случаях, когда: Вы используете составные первичные ключи или когда первичный ключ не является целым числом, а имеет другой тип данных. Если вам нужно повысить скорость работы таблицы с первичным ключом INTEGER, создавайте таблицу без внутреннего индекса, этим вы ускорите выборку и уменьшите объем базы данных. Если таблицы имеет индекс ROWID и индекс в виде INTEGER PRIMARY KEY, то SQLIte делает перебор двумя циклами: первый цикл идет по столбцу ROWID, второй цикл идет по столбцу INTEGER PRIMARY KEY, хотя значения этих столбцов совпадают. Если в таблицах хранится небольшое количество строк, то таблицы без индекса (WITHOUT ROWID) будут работать несколько быстрее, чем со столбцом ROWID. Если вы проектируете базу данных и хотите ее оптимизировать, то вам не стоит задумываться о том, какие таблицы использовать: ROWID или WITHOUT ROWID, на этапе разработки и проектирования. Тесты лучше всего проводить после того, как база данных будет спроектирована и реализована. Так как никаких отличий между таблицами с ROWID и без нет, за исключением тех, что описаны выше, нет.
SelectTec | Aula Nº 10 | Operador IN - Oracle SQL Developer
 
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in syntax: select * from tabela coluna_n1 in ('X,'Y','Z');
Views: 3499 SelectTec
Learn Oracle | How to use Outer Joins Left, Right, Full in SQL
 
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Pebbles present, Learn Oracle 10g with Step By Step Video Tutorials. Learn Oracle 10g Tutorial series contains the following videos : Learn Oracle - History of Oracle Learn Oracle - What is Oracle - Why do we need Oracle Learn Oracle - What is a Database Learn Oracle - What is Grid Computing Learn Oracle - What is Normalization Learn Oracle - What is ORDBMS Learn Oracle - What is RDBMS Learn Oracle - Alias Names, Concatenation, Distinct Keyword Learn Oracle - Controlling and Managing User Access (Data Control Language) Learn Oracle - Introduction to SQL Learn Oracle - Oracle 10g New Data Types Learn Oracle - How to Alter a Table using SQL Learn Oracle - How to Create a Package in PL SQL Learn Oracle - How to Create a Report in SQL Plus Learn Oracle - How to Create a Table using SQL - Not Null, Unique Key, Primary Key Learn Oracle - How to Create a Table using SQL Learn Oracle - How to Create a Trigger in PL SQL Learn Oracle - How to Delete Data from a Table using SQL Learn Oracle - How to Drop and Truncate a Table using SQL Learn Oracle - How to Insert Data in a Table using SQL Learn Oracle - How to open ISQL Plus for the first time Learn Oracle - How to Open SQL Plus for the First Time Learn Oracle - How to Update a Table using SQL Learn Oracle - How to use Aggregate Functions in SQL Learn Oracle - How to use Functions in PL SQL Learn Oracle - How to use Group By, Having Clause in SQL Learn Oracle - How to Use Joins, Cross Join, Cartesian Product in SQL Learn Oracle - How to use Outer Joins (Left, Right, Full) in SQL Learn Oracle - How to use the Character Functions, Date Functions in SQL Learn Oracle - How to use the Merge Statement in SQL Learn Oracle - How to use the ORDER BY Clause with the Select Statement Learn Oracle - How to use the SELECT Statement Learn Oracle - How to use the Transactional Control Statements in SQL Learn Oracle - How to use PL SQL Learn Oracle - Data Types in PL SQL Learn Oracle - Exception Handling in PL SQL Learn Oracle - PL SQL Conditional Logics Learn Oracle - PL SQL Cursor Types - Explicit Cursor, Implicit Cursor Learn Oracle - PL SQL Loops Learn Oracle - Procedure Creation in PL SQL Learn Oracle - Select Statement with WHERE Cause Learn Oracle - SQL Operators and their Precedence Learn Oracle - Using Case Function, Decode Function in SQL Learn Oracle - Using Logical Operators in the WHERE Clause of the Select Statement Learn Oracle - Using Rollup Function, Cube Function Learn Oracle - Using Set Operators in SQL Learn Oracle - What are the Different SQL Data Types Learn Oracle - What are the different types of Databases Visit Pebbles Official Website - http://www.pebbles.in Subscribe to our Channel – https://www.youtube.com/channel/UCNNjWVsQqaMYccY044vtHJw?sub_confirmation=1 Engage with us on Facebook at https://www.facebook.com/PebblesChennai Please Like, Share, Comment & Subscribe
Views: 295 Pebbles Tutorials
Web Web - Oracle (Interview)
 
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Artist: Web Web Titel: Oracle Releasedate: 01.09.17 Format: LP / CD / digital buy here: https://compostrecords.lnk.to/WebWebOracle The first album of Web Web is very uncut, raw, live and direct. „Oracle“ is the first output of a German Supergroup. The initial idea was to record a spiritual- jazz type of album, with all its imperfection as far as intonation, sound, influences of tunes... just like from their big jazz-heroes in the 70ies (e.g. Strata East, Black Jazz). Web Web’s idea was to record a jazz jam session while to found and proclaim being a fictive band, a formation, which did not exist, while telling people, it would be a secret jam session recording of the Seventies. The prompt problem they were facing: Oh, we never would be able to play concerts, doing interviews, or placing photos on sleeves or post likeness images online. So they decided to reveal their real identities: Web Web are: Roberto Di Gioia (Piano, Synth, Percussion), Tony Lakatos (Tenor- and Sopranosaxophone), Christian von Kaphengst (Upright Bass) and Peter Gall (Drums). The album „Oracle“ was recorded on one day, only first takes were used!
Views: 320 Compost Records
SQL SELECT INTO Statement  Telugu | Using the SELECT INTO statement-vlr training
 
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For all sql videos in Telugu :http://www.vlrtraining.in/sql-training-videos-telugu/ In Telugu: SQL SELECT INTO Statement Telugu How to Use INSERT INTO SELECT Statement in SQL SELECT INTO statement in PL/SQL Inserting Rows by Using SELECT INTO SQL Server - How to Select Into Statement Using the SELECT INTO statement In English: download sql study material Website: http://www.vlrtrain.in/2016/09/download-sql-files.html Learn SQL sql tutorial for beginners sql commands oracle sql tutorial sql tutorial advanced mysql tutorial sql tutorial video SQL Tutorial, Tutorials SQL
Views: 1087 VLR Training
34 - T-SQL - Subconsultas (subqueries) com Tabelas Derivadas - SQL Server
 
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34 - T-SQL - Subconsultas (subqueries) com Tabelas Derivadas - SQL Server
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