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Oracle SQL Tutorial 25 - ASCII and Unicode
 
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In the previous video we talked about some of the most popular data types. We are going to discuss them in more detail. The data type we are going to start with is CHAR and NCHAR. I told you of both of these but I never explained the difference. That's because there is some other stuff I need to explain before I can explain the difference. This has to deal with what is known as character sets. When you have a string, there are only so many characters you are allowed to store in that string. The characters you are allowed to store is determined by what is known as the character set. A common character set is ASCII. This character set allows you to store English characters, numbers, and some symbols. ASCII started with 127 characters, and then they came out with the ASCII extended, which allows for up to 255 characters. Even with 255 characters though, we are limited in what we can store using one character set. If the computer only allows ASCII, we are going to be limited when working with different languages. Of course it works for some situations, but globalization of software has been a big thing with the development of the interwebs …and the movement towards a new world order (Revelation 13:7). That means that ASCII is no longer the best character set. It has largely been replaced with a character set known as Unicode. Oracle has a few Unicode character sets that we can use when we work with string data. When you start studying character sets, I can promise that you will run across the word encoding. Encoding refers to the way that the allowed characters can be stored on the computer. A computer doesn't just store a letter, everything has to be stored in binary. Unicode is the character set, but it has numerous different encodings. Essentially, the computer can store the same characters in multiple different ways, depending on which encoding is used. The most popular encodings for Unicode are UTF-8 and UTF-16. UTF stands for Unicode Transformation Format. In the next video we will be discussing these in detail and express their differences. Once we got that down, we'll be able to loop back around to data types. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 5447 Caleb Curry
Oracle SQL Tutorial 30 - UTF-8 and UTF-16 Character Sets
 
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A few videos ago we discussed UTF-8 and UTF-16 encoding, but when we are working with a database we do not worry about encodings as much as we do character sets. That's because a specific character set is going to have a specific encoding. The reason I am making this video is to introduce you to the most common character sets and to teach you the differences. That’s because as we go into the national character sets we need to understand the information taught in this video. So the first character set I am going to teach you about is AL32UTF8. AL32UTF8 is a character set that uses the uff-8 encoding and each character can take up to 4 bytes with the utf-8 encoding. There is another character set (not encoding) called utf8 (no hyphen) which is also encoded with UTF-8. This can be a little confusing because UTF8 is the name of an encoding and a character set, but bear with me. Both of these character sets are UTF-8 encoded, but UTF8 uses an older version of UTF-8 encoding. Generally, they work about the same, but the way certain characters are stored is slightly different, specifically way certain characters are stored is slightly different, specifically what are known as supplementary characters, which take up 4 bytes. The max size for a UTF8 character set is 3 bytes, as they do not directly support the supplementary characters as 4 bytes but instead store them across 2 groups of 3 bytes each. Oracle recommends that you use AL32UTF8 for all future development instead of the archaic UTF8 character set. There is another character set that you should know about, and that is AL16UTF16, which uses the UTF-16 encoding. Watch my video over UTF-8 and UTF-16 to learn more about UTF-16. Lastly, there is a character set known as UTFE, which uses an encoding known as UTF-EBCDIC. This is like a super archaic character set, and I'm not even going to talk about it. I thought I would at least mention it as it is going to come up a bit in the next video's topic. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 6541 Caleb Curry
Oracle SQL Tutorial 27 - CHAR Part 1
 
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This video and the next is going to cover CHAR and NCHAR. Be sure to check out the previous two videos as these are going to introduce you to some foundational knowledge required to understand these data types. CHAR is a fixed-length data type. What that means is that every value for a CHAR column is going to be the same length. You specify the length in parenthesis when you create the table. The thing you need to know though is that the default measurement is in bytes. That means if you specify the length to be CHAR(50), the length of each value will be 50 bytes, by default. If you want to change that to 50 characters, you can pass in the word CHAR as in CHAR(50 CHAR). This is known as a qualifier. Specifically, they are known as length semantics qualifiers (describes the meaning of the given length). Now, I said the default was bytes, but you can actually change the default to characters. In that situation, you can actually use the keyword BYTE to break away from the default. In general, it's best to put CHAR or BYTE even if it is the default. In general, it's best to keep things consistent. It's okay to have these measured in CHAR or BYTE, but it is recommended that every column is the same. It allows you to be more consistent as if some columns measure length in bytes and some measure length in characters, things can get confusing. If you do want to change the default, look up NLS_LENGTH_SEMANTICS as well as the potential problems it may bring. What values are allowed in parenthesis? That is what we are going to discuss in the next video. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 4322 Caleb Curry
Oracle SQL Tutorial 32 - VARCHAR2 and NVARCHAR2
 
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This video we are going to discuss the VARCHAR2 and the NVARCHAR2 data types. The previous videos are a good foundation to this video. I've actually discussed so much stuff in those videos that I don’t have a whole lot to say. Good for you, right? I discussed over the previous videos that you should prefer to use VARCHAR2 over CHAR. That's because there is not a difference in performance or storage for a VARCHAR2 column. The only difference is that an CHAR column forces each value to take up a certain length even if it's not. There is one difference between the variable length and fixed length data types here that you need to know about, and that is storage limits. CHAR has a limit of 2000 bytes, while VARCHAR2 has a limit of 4000 bytes. That means you can store twice as much junk in a VARCHAR2 column! Other than that, these data types work exactly the same. I recommend you always use the VARCHAR2 data types instead of the CHAR data types, and only use NVARCHAR2 if you have a non-Unicode database. This will allow you to store Unicode characters in a column. Now, the amount of storage you can put in a VARCHAR2 column is twice what you can put in a CHAR column, but 4000 characters is still not very many characters. This is where the LOB data types come in, which we will discuss in the next video! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 5125 Caleb Curry
Oracle SQL Tutorial 28 - CHAR Part 2
 
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Now this video is a continuation of the last video. I decided to break the video up into sections so they didn't cover so much information and drag on for 10 minutes. This video we are going to talk about the length of CHAR. Now it is important to remember that CHAR is a fixed-length data type. This means that every row's value for this column is going to have the same length. The length is given to the database by specifying the length in parenthesis, such as CHAR(10). If you give a value shorter than that, it will be padded with spaces. What range is allowed though? The lowest is actually one. The highest is 2000. Now, remember that Oracle allows either the specification of CHAR or BYTE. The limit of 2000 is actually 2000 bytes. What happens if you put 2000 CHAR? Well, Oracle actually lets you do that. What is the problem with this though? The problem is that not all characters are 1 byte. This means that our 2000 CHAR is inaccurate. This will only work with 1 byte characters. This might not seem like a big problem, but it can lead to runtime errors in code that uses our database. A runtime error is when our code runs and in certain circumstances we get an error and others we do not. If we allow a user to insert up to 2000 characters, but they decide to use multibyte characters such as Chinese, we will get an error. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 3478 Caleb Curry
Introduction to UTF-8 and Unicode
 
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This video gives an introduction to UTF-8 and Unicode. It gives a detail description of UTF-8 and how to encode in UTF-8. This is a video presentation of the article "How about Unicode and UTF-8" which was published on www.gamedev.net. Writing an STL-Style UTF-8 String Class - http://squaredprogramming.blogspot.com/2013/12/writing-stl-style-utf-8-string-class.html How about Unicode and UTF-8 - http://www.gamedev.net/page/resources/_/technical/general-programming/how-about-unicode-and-utf-8-r3322 www.squaredprogramming.com
Views: 140193 Squared Programming
Oracle SQL Tutorial 26 - UTF-8 and UTF-16
 
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UTF-8 and UTF-16 are different encodings for the Unicode character set. Let's discuss UTF-8 first. UTF-8 is what is known as a variable-length character set. This means that the amount of storage a character takes up depends on what character it is. For example, if we store the character A, it will only take up one byte. In fact, ASCII is a subset of UTF-8. That means UTF-8 encoding can work with ASCII data. If you are new to computer storage, a byte is a very small amount of information. The smallest thing a computer can store is a bit. 1 or 0. On or off. There are 8 bits in a byte, 1024 bytes in a kilobyte, 1024 kilobytes in a megabyte, 1024 megabytes in a gigabyte, and 1024 gigabytes in a terabyte, and 1024 terabytes in a petabyte. Considering it is completely possible for a database to be multiple petabytes, you can understand that a byte is very small. If you store a non-English character, the size of UTF-8 will increase to 2, 3, or 4 bytes. If you think back to when we used the VARCHAR data type, we passed in 50 CHAR. The reason we throw in that CHAR is that the default for Oracle is 50 characters. Now you can understand why adding the CHAR might be important. If a character can take up multiple bytes, you cannot guarantee 50 characters. Now, on to UTF-16. UTF-16 is also a variable length encoding, but it differs in that It is either 2 or 4 bytes. That means to store an A, it now takes two bytes rather than one. Even though a byte is so small, when you are storing billions of characters, an unnecessary byte really adds up to a lot of wasted storage. We can only represent so many characters with 2 bytes. When we run out of options, we move to four bytes to allow for other characters. Which do we use? It often depends on what platform you are on and also what languages you are working with. For example, if you are working with Asian language, UTF-16 stores each character in 2 bytes while UTF-8 stores each character in 3 bytes. So you could save space by using UTF-16. Additionally, UTF-16 works better when you are writing code in Java or something from Microsoft .NET because UTF-16, or a subset of it called UCS-2, is widely adopted. Other than that, UTF-8 will be the one you want. Now that we have built a pretty good foundation of character sets, we can now continue our discussion of data types. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 7308 Caleb Curry
4 Unicode and N character in SQL Server
 
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with Arabic content by easy way to learn شرح بالعربي
Oracle DECOMPOSE Function
 
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The Oracle DECOMPOSE function is used to transform a string into a Unicode string. It will split a character that has an accent, for example, into two characters. It’s the opposite of the COMPOSE function. The syntax of the DECOMPOSE function is: DECOMPOSE ( input_string [CANONICAL|COMPATIBILITY] ) The parameters of this function are: - input_string is the string that will be decomposed into separate character values in a string. It can be any character data type. - CANONICAL|COMPATIBILITY is an optional parameter and allows you to specify the mode of decomposition. CANONICAL is the default. CANONICAL means it can be re-composed with the COMPOSE function. COMPATIBILITY means that it can’t be re-composed, but it can be useful for katakana characters. For more information about Oracle SQL functions, visit Database Star: https://www.databasestar.com/sql-functions/
Views: 72 Database Star
Differences between Unicode and Non Unicode Datatypes | MSSQL Training
 
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** For Online Training Registration: https://goo.gl/r6kJbB ? Call: +91-8179191999 ? Visit Our Website for Classroom Training: https://nareshit.in/sql-server-training/ ? For Online Training: https://nareshit.com/course/sql-server-online-training/ #sqlserver #server #programming #course #Tutorials #Training #Videos -------------------------- ? About NareshIT: "Naresh IT is having 14+ years of experience in software training industry and the best Software Training Institute for online training, classroom training, weekend training, corporate training of Hadoop, Salesforce, AWS, DevOps, Spark, Data Science, Python, Tableau, RPA ,Java, C#.NET, ASP.NET, Oracle, Testing Tools, Silver light, Linq, SQL Server, Selenium, Android, iPhone, C Language, C++, PHP and Digital Marketing in USA,Hyderabad, Chennai and Vijayawada,Bangalore India which provides online training across all the locations -------------------------- ? Our Online Training Features: 1.Training with Real-Time Experts 2.Industry Specific Scenario’s 3.Flexible Timings 4.Soft Copy of Material 5. Share Videos of each and every session. -------------------------- Please write back to us at [email protected]/[email protected] or Call us at USA: +1404-232-9879 or India: +918179191999 ** Check The Below Links** ? For Course Reg: https://goo.gl/r6kJbB ? Subscribe to Our Channel: https://goo.gl/q9ozyG ? Circle us on G+: https://plus.google.com/NareshIT ? Like us on Facebook: https://www.facebook.com/NareshIT ? Follow us on Twitter: https://twitter.com/nareshitech ? Follow us on Linkedin: https://in.linkedin.com/company/naresh-i-technologies ? Follow us on Instagram: https://www.instagram.com/nareshitech/
Views: 11006 Naresh i Technologies
SQL Server CHAR Function ASCII and CHARINDEX String Search Queries Command DB
 
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SQL Server Database CHAR Function ASCII and CHARINDEX String Search Queries Command DB.
Views: 20 Saidah Faulia
Character Encoding and Unicode Tutorial
 
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In this video, we are going to learn about character encoding and what role it plays in computer science and day to day software development. If you are a web developer or a mobile app developer, you need to understand this core concept properly. So let's dive in. Follow me on: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Facebook: https://facebook.com/raynstudios Instagram: https://instagram.com/rajat1saxena Twitter: @rajat1saxena Quora: https://www.quora.com/profile/Rajat-Saxena-45 Website: https://medium.com/rayn-studios ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Email me your queries at: [email protected]
Views: 290 Rayn Studios
Unicode explained | Convert characters in Chuck Norris jokes - JavaScript example
 
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Unicode provides us with a standard list of unique codes for each character from most of the world’s writing systems. 1) The word “Encode” is a verb that means “convert to coded form.” 2) The word “Decode” is a verb that means “convert from coded form.” Let's check it out! Notebook link: https://beta.observablehq.com/@deeplizard/encode-and-decode-chuck-norris-jokes-in-unicode Prerequisites: Textual data explained: https://youtu.be/-XLZadCdo9Q CLIs Explained: https://youtu.be/oBP_umJb_2U Follow deeplizard: YouTube: https://www.youtube.com/deeplizard Twitter: https://twitter.com/deeplizard Facebook: https://www.facebook.com/Deeplizard-145413762948316 Steemit: https://steemit.com/@deeplizard Instagram: https://www.instagram.com/deeplizard/ Pinterest: https://www.pinterest.com/deeplizard/ Support deeplizard on Patreon: https://www.patreon.com/deeplizard Checkout products deeplizard suggests on Amazon: https://www.amazon.com/shop/deeplizard Support deeplizard by browsing with Brave: https://brave.com/dee530 Support deeplizard with crypto: Bitcoin: 1AFgm3fLTiG5pNPgnfkKdsktgxLCMYpxCN Litecoin: LTZ2AUGpDmFm85y89PFFvVR5QmfX6Rfzg3 Ether: 0x9105cd0ecbc921ad19f6d5f9dd249735da8269ef Recommended books on AI: The Most Human Human: What Artificial Intelligence Teaches Us About Being Alive: http://amzn.to/2GtjKqu Life 3.0: Being Human in the Age of Artificial Intelligence https://amzn.to/2H5Iau4 Playlists: Data Science - https://www.youtube.com/playlist?list=PLZbbT5o_s2xrth-Cqs_R9-us6IWk9x27z Machine Learning - https://www.youtube.com/playlist?list=PLZbbT5o_s2xq7LwI2y8_QtvuXZedL6tQU Keras - https://www.youtube.com/playlist?list=PLZbbT5o_s2xrwRnXk_yCPtnqqo4_u2YGL Crypto hardware wallets: Ledger Nano S: http://amzn.to/2FZGP7y Trezor: http://amzn.to/2FZHs0U Music: Deadly Roulette by Kevin MacLeod Scheming Weasel faster by Kevin MacLeod Monkeys Spinning Monkeys by Kevin MacLeod YouTube: https://www.youtube.com/channel/UCSZXFhRIx6b0dFX3xS8L1yQ Website: http://incompetech.com/ Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/
Views: 385 deeplizard
Using COUNT in Other Ways (Introduction to Oracle SQL)
 
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Other ways to use the COUNT function in SQL. The full Introduction to Oracle SQL course is available here: https://www.databasestar.com/introduction-to-oracle-sql-course/
Views: 158 Database Star
CHANGING THE CHARACTER SET TO AL32UTF8
 
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By using these steps you can change the oracle database character set to AL32UTF8
Views: 28941 venkatesh sankala
ORACLE 12c: How to extend VARCHAR2 datatypes to 32k
 
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New feature 12c: Extend to VARCHAR2() 32k, instead of 4000 bytes. Let take advanced of VARCHAR2 over CLOB !!
Views: 5354 Database Tutorials
Find Special Character in a string using Sql
 
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In this video we learn how to find the special character , number in a string using sql server. -- How to Find Number and character in a string SELECT Employeeid,LastName FROM Employees WHERE LastName like '%[^0-9A-Z]%' -- How to find Special Character in a string SELECT Employeeid,LastName FROM Employees WHERE LastName like '%[@,#,$,%,*]%' -- How to find number in a string SELECT Employeeid,LastName FROM Employees WHERE LastName like '%[0-9]%'
Views: 1813 SmartCode
Oracle SQL Tutorial 22 - Why Primary Keys Shouldn't Change
 
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In the last video I mentioned that with our database design it is important to make sure that nobody tries to update a user's username. What happens if they do? Nothing horrible, Oracle will just throw an error. That's not such a big deal, but if you are hoping to make some kind of application that allows someone to change their username, this is not the best set up. Why? If you look at the projects table, we have a foreign key that references the username. Let's assume for a moment that Oracle allows you to do anything with your data. That means that if a user updates their username, there will be projects created by users that don't exist. Or a user could change their name to the previous owner. To fix this problem, we would need something such as an ON UPDATE CASCADE command for our foreign key. That would mean that if the user updated their username, the columns that reference that username would also update to the new value. This exists in some database management systems, but this does not exist in Oracle at the time of this video. How do we get around this problem? I'm sure we could conjure up something to allow us to update the username, but the easiest solution is to reference the user_id instead of the username. That way, when the username is updated, nothing changes inside of the foreign key. As a general rule, primary keys should never change. Foreign keys CAN change, but they should not change because a primary key changed. So, if we did happen to use a username as a column, it would be frowned upon if the username had to change because the column it references changes. However, it would be acceptable to change the foreign key if we needed to point to a new entity in the users table. Even if a username is never intended to change, these complications bother a lot of people. You can mitigate these problems by only referencing surrogate keys in foreign keys. This has the downside though that when you retrieve the data, you are going to have to do more work to make the data readable. For example, we had a table that was called project_users. It is essentially a table that says what users are part of what projects. We could have the foreign keys reference the project's name and the user's username. Then when you could say SELECT * FROM project_users. The data would be completely readable without doing anything. If you switch to only referencing surrogate primary keys, you will have a bunch of random numbers that don't mean anything and will have to be joined with other tables…which is really super frustrating when later you have to join a thousand tables to read anything. Which side do you prefer? Pick a side. Choose wisely. I'll see you all in the next video ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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: 5637 Caleb Curry
nchar, nvarchar, and ntext Microsoft SQL Server Tutorial - Unicode Data Types
 
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What considerations do Unicode data types such as nvarchar and nchar have over ASCII ones? This Microsoft SQL Server tutorial provides an overview.
Views: 7479 Edward Kench
SQL lesson 29, Difference between char and varchar2
 
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The video will explain the difference between alphanumeric datatypes char and varchar2
Views: 5479 hammadshams
Java - char data type, identifiers, unicode escape, UTF-16 encoding
 
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recording of sesson on Data Types - part related to Unicode, char type, unicode escape, etc.
Views: 241 classofjava
Difference between char,nchar,varchar,nvarchar in SqlServer
 
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Compleate diffrence between char,nchar,varchar,nvarchar in SqlServer
Views: 14371 Tech mohan
Characters in a computer - Unicode Tutorial UTF-8 (3/3)
 
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This tutorial explains the utf-8 way of representing characters in a computer; later generalizing (high level) how any kind of data can be represented in a computer.
Views: 41822 dizauvi
ascii,instr | sql functions | oracle database 11g version 2 |
 
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executed in oracle database 11g version 2
Views: 175 Education 4u
Unicode and character encoding
 
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Internationalization and localization expert Adam Asnes of Lingoport discusses Unicode and character encoding in this video.
Views: 44788 Lingoport
SQL TUTORIAL - CHARACTER FUNCTIONS || TRIM || REPLACE || CONCAT || SUBSTR || INSTR || REPLACE
 
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In this video i'm going to demonstrate you about oracle sql single row functions step by step. concat funcation, substr function, instr function, lpad function, rpad function, trim function, replace function.
Views: 2341 OCP Technology
Standards: ASCII vs Unicode (Java)
 
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The video looks at the underpinnings of Java's character (char) data type. It looks at how ASCII was created and show how Unicode took its place as the standard.
Views: 10135 Nathan Schutz
SQL ASCII Function - how to use ASCII function
 
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SQL ASCII function returns the NUMBER code that represents the specified character. It is the opposite of the CHAR function. visit Dose for excel Add-In website: http://www.zbrainsoft.com/ Visit our channel: https://www.youtube.com/channel/UCI4bMWYzrBTs47KINXL92Kw
Differences between Char and Varchar Datatypes |  MSSQL Training
 
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** For Online Training Registration: https://goo.gl/r6kJbB ? Call: +91-8179191999 ? Visit Our Website for Classroom Training: https://nareshit.in/sql-server-training/ ? For Online Training: https://nareshit.com/course/sql-server-online-training/ #sqlserver #server #programming #course #Tutorials #Training #Videos -------------------------- ? About NareshIT: "Naresh IT is having 14+ years of experience in software training industry and the best Software Training Institute for online training, classroom training, weekend training, corporate training of Hadoop, Salesforce, AWS, DevOps, Spark, Data Science, Python, Tableau, RPA ,Java, C#.NET, ASP.NET, Oracle, Testing Tools, Silver light, Linq, SQL Server, Selenium, Android, iPhone, C Language, C++, PHP and Digital Marketing in USA,Hyderabad, Chennai and Vijayawada,Bangalore India which provides online training across all the locations -------------------------- ? Our Online Training Features: 1.Training with Real-Time Experts 2.Industry Specific Scenario’s 3.Flexible Timings 4.Soft Copy of Material 5. Share Videos of each and every session. -------------------------- Please write back to us at [email protected]/[email protected] or Call us at USA: +1404-232-9879 or India: +918179191999 ** Check The Below Links** ? For Course Reg: https://goo.gl/r6kJbB ? Subscribe to Our Channel: https://goo.gl/q9ozyG ? Circle us on G+: https://plus.google.com/NareshIT ? Like us on Facebook: https://www.facebook.com/NareshIT ? Follow us on Twitter: https://twitter.com/nareshitech ? Follow us on Linkedin: https://in.linkedin.com/company/naresh-i-technologies ? Follow us on Instagram: https://www.instagram.com/nareshitech/
Views: 16090 Naresh i Technologies
Oracle SQL Tutorial 24 - Important Data Types
 
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In the upcoming videos we are going to discuss data types in depth, but I don't want to drown you in all of the details. Because of that, I'm giving you this video which is going to introduce you to the most important data types. Then, in the upcoming videos, I'll describe them in more depth. One of the data types we've already discussed in this video is NUMBER. This data type is used to, obviously, store a number. It can be used to store integers (whole numbers), or numbers with decimals. There are two other numeric data types you should know of. BINARY_FLOAT and BINARY_DOUBLE are both numeric data types that are known as floating point numbers. A floating point number is often used for large numbers that have decimal places where it is acceptable to not be completely precise. What I mean by this is that these numbers can only store numbers correctly up to a certain decimal point. If you need perfect precision, you will want to use the NUMBER data type. Now storing numbers is good sometimes, but occasionally you will want to store string data. String data can be any sequence of characters, including numbers. By telling the database that a column is a string data type, the database knows how to treat that column. There are four important string data types that you need to know about. The first two are CHAR and NCHAR. These data types are used to store a fixed-length string. So for example, you can say you want to store 12 characters. This means that every value for this column will be exactly 12 characters. If you insert less than 12 characters, the data will be padded with spaces. This means you will want to use one of these data types when every value in the column is the same length. What is the difference between CHAR and NCHAR? CHAR uses what is known as ASCII while NCHAR uses Unicode. The difference is what characters are allowed and how much space each character takes. ASCII takes up less space but only supports English, numbers, and some symbols. UNICODE allows you to store characters from multiple languages but takes up more space. Those were both fixed-length string. What if you want to store data that changes in length? That is where VARCHAR2 and NVARCHAR2 come in. When it comes to storing dates, the data types that are most important are DATE and TIMESTAMP. Date can be used to store dates and time. Timestamp is a data type that can be used to store an exact moment in time. Lastly, there are interval types. These store a date range. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 6049 Caleb Curry
Oracle UPPER Function
 
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https://www.databasestar.com/oracle-upper-lower/ The Oracle UPPER function is used to convert a string to an uppercase value. It capitalises a string value. It’s useful for comparing text or string values that may have mixed case, such as user input or data from different tables. The opposite of the UPPER function is the LOWER function (which converts to lower case). The syntax of UPPER is: UPPER(input_string) The input_string is the string value to convert to an upper case value. It can be any of CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. The return type is the same as the input type. You can use the UPPER function in a WHERE clause. However, unless you have a function-based index on the column, any indexes won’t be used. For example, if you have an index on first_name, a query that uses “WHERE UPPER(first_name)” won’t use this index. You’ll have to create an index on the UPPER(first_name) for this to be used. It’s not required, but it’s just something to keep in mind. For more information about the Oracle UPPER function, including all of the SQL shown in this video and the examples, read the related article here: https://www.databasestar.com/oracle-upper-lower/
Views: 115 Database Star
Session6 Data type in Oracle
 
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Session 6: Datatypes In Oracle   ALPHABET           : A-Z , a-z NUMBER              : 0-9 (with precision and scale) DATE / Temporal  : any Date and time (Hours, Minutes, Seconds, Mili-seconds, Timestamp, Timezone etc)   Alphabet + Number = Alphanumeric Data                                     = String / CHARACTER Datatype Category Number                    =  Numeric Datatype Category Date                         = Date Datatype Category 1. CHARACTER Datatype: CHAR, VARCHAR, NCHAR: CHAR is fixed length datatype and VARCHAR is Variable length datatype to store character data. i.e. A-Z , a-z , 0-9 , all keyboard characters etc. The default size is 1 character and it can store maximum up to 2000 bytes. Example : EName, EmpID, PassportNo, SSN, etc. EName CHAR(10) := ‘TOM’; wastage of 7 space after the string EName VARCHAR(10) := ‘TOM’; Spaces can be Reuse which left after the string NCHAR additionally handles NLS(National Language Support). Oracle supports a reliable Unicode datatype through NCHAR , NVARCHAR2 , and NCLOB  VARCHAR2, NVARCHAR2: These are Variable length datatype. VARCHAR2 handles alphanumeric character string whereas NVARCHAR2 handles alphanumeric character string with NLS(National Language Support). The default size is 1 character and it can store maximum up to 4000 bytes.   LONG:  Variable length string.  (Maximum size: 2 GB - 1) Only one LONG column is allowed per table. RAW:    Variable length binary string (Maximum size 2000 bytes) LONG RAW: Variable length binary string (Maximum size 2GB) 2. NUMERIC Datatype: NUMBER: It stores Numeric values and performs numeric calculations. NUMBER,   NUMBER(n),   NUMBER(p,s) It stores Numbers up to 38 digits of precision. SeqNo NUMBER;                     1, 123, 12345678 EmpID NUMBER(4);                 1, 123, 1234 Sal NUMBER(7,2);                     23456.78 , 123.45 — correction in video: Sal NUMBER(a7,2); which is wrong please ignore. 1234567 can be a type of NUMBER, NUMBER(7), NUMBER(7,0) It can store both integer and floating point numbers NUMERIC(p,s) FLOAT:   Ex:  EmpSal FLOAT;    FLOAT(7)       Decimal Points allowed DEC(p,s), DECIMAL(p,s) , REAL, DOUBLE PRECISION INTEGER:   Ex:  SSN INTEGER;       Decimal Points are not allowed INT, SMALLINT 3. DATE Datatype: DATE: It stores DATE(Date, Month, Year) and Time(Hour, Minute, Second, AM/PM) and performs calculations with such data. Default DATE format in Oracle is “DD-MON-YY” Based on "Gregorian calendar" where the date ranges from “JAN 1 4712 BC” to “DEC 31 9999 AD” doj DATE;    “18-MAR-2010 12:30:00 PM” TIMESTAMP:    It can store all parameters as DATE datatype and additionally it can have “Fraction of seconds” and TIMESTAMP WITH TIMEZONE / TIMESTAMP WITHOUT TIMEZONE. Range from 0-9 digits, the default size is 6. 4. LOB Datatype: LOB: “Large Object” data. It can store pictures, motion pictures, Textfiles etc. CLOB: “Character Large Object” is used to store structured information like a text file with a specific file format. BLOB: “Binary Large Object” is used to store Un-structured information like Image, JPEG files, MPEG files etc. BFILE: “Binary File” is used to store the pointer to a specific file / Just store the location of a file. Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB) Extra Information: NCLOB : It supports all the character set supported by CLOB and additionally it handles NLS(National Language Support ) Maximum size: (4 GB - 1) * DB_BLOCK_SIZE initialization parameter (8 TB to 128 TB) ROWID and UROWID(optional size) Datatype: contains fixed length Binary data. BBBBBBB.RRRR.FFFFF combination of BLOCK-ROW-DATABASE FILE Physical and Logical ROWID Upcoming Session: Session 7: Populating Data into Tables(INSERT Statement): Inserting data into all columns of a table Inserting data into Required columns of a table Inserting NULL value into a table Inserting Special Values(USER / SYSDATE) into a table Supplying data at runtime(using & and &&) THANK YOU :)
Views: 106 Prabhat Sahu
SQL function ASCII() , Char() With example in Hindi Part 1
 
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In this video, We will learn system define function of string ASCII() and Char() in SQL.
difference between char and varchar data types
 
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in this example i have tried to explain how data is stored in the char and varchar datatype in oracle
Views: 4100 R.gowtham Kumar
011 E - Difference betwween CHAR, VARCHAR, VARCHAR2, NVARCHAR
 
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The difference between different types of character datatypes CHAR VARCHAR VARCHAR2 NVARCHAR
Views: 3403 Rishabh Jain
Java chars are not characters, but UTF-16 code units. Palindromes with surrogate pairs are fun!
 
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https://docs.oracle.com/javase/8/docs/api/java/lang/Character.html#unicode https://www.joelonsoftware.com/2003/10/08/the-absolute-minimum-every-software-developer-absolutely-positively-must-know-about-unicode-and-character-sets-no-excuses
Views: 192 Fred Overflow
CHAR vs VARCHAR
 
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Views: 2498 Rocky Jagtiani
Oracle SQL Tutorial 31 - NCHAR Part 2
 
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This video is going to be part 2 of NCHAR. That's because I have a bit more things to say about it before we move on to other data types. The first thing I wanted to mention is that if you declare an NCHAR(50), it is going to always be 50 characters. You do not need to use the CHAR or BYTE keyword in parenthesis to specify which you would like. We've said that NCHAR uses Unicode, but as we've learned in the last video, there are many character sets that use Unicode. Which character set is NCHAR going to use? That decision is based off of what your database's national character set is. So for every database you can declare a database character set and you can declare a national character set. The national character set is what is used for this data type. There are two options for the national character set, AL16UTF16, and UTF8. The default is AL16UTF16, which uses the utf-16 encoding. The Oracle docs has a lot of pros and cons for each one, but in general the defaults are default for a reason, so AL16UTF16 usually works fine. Now, a few videos ago I made a comment about the CHAR and NCHAR data types and how they might not be recommended. Why so? The reason is that CHAR is secretly just a VARCHAR2 that is padded to take up a full length. It does not save space nor improve performance in the database, so the chances are you are never going to want to use it. That being said, everything you've learned has not been a waste because a lot can be applied to the VARCHAR2 and NVARCHAR2 data types. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 3461 Caleb Curry
SQL Tutorial - 39: UPPER() and LOWER() Functions
 
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In this tutorial we'll learn to display characters in upper case or lower case using the UPPER and LOWER functions.
Views: 22041 The Bad Tutorials
Oracle LOWER Function
 
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https://www.databasestar.com/oracle-upper-lower/ The Oracle LOWER function is used to convert a string to a lowercase value. It’s useful for comparing text or string values that may have mixed case, such as user input or data from different tables. The opposite of the LOWER function is the UPPER function (which converts to upper case). The syntax of LOWER is: LOWER(input_string) The input_string is the string value to convert to a lower case value. It can be any of CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. The return type is the same as the input type. You can use the LOWER function in a WHERE clause. However, unless you have a function-based index on the column, any indexes won’t be used. For example, if you have an index on first_name, a query that uses “WHERE LOWER(first_name)” won’t use this index. You’ll have to create an index on the LOWER(first_name) for this to be used. It’s not required, but it’s just something to keep in mind. For more information about the Oracle LOWER function, including all of the SQL shown in this video and the examples, read the related article here: https://www.databasestar.com/oracle-upper-lower/
Views: 46 Database Star
Datatypes : Oracle (Sql)
 
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Oracle Datatypes Difference between Char and Varchar Date Number
Views: 61 CodeSmith 001
CHR Function in SQL Query with Example
 
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CHR(): The Oracle/PLSQL CHR function is the opposite of the ascii function. It returns the character based on the NUMBER code. Syntax: CHR( number_code ) Here number_code is the NUMBER code used to retrieve the character. Example: Let's look at some Oracle CHR function examples and explore how you would use the CHR function in Oracle/PLSQL. CHR(116) would return 't' CHR(84) would return 'T' Thanks for watching...:)
Views: 894 WingsOfTechnology
3 2 intro to oracle datatypes
 
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Video from our Oracle SQL course. Check out the full course at.. http://learn.hackpress.co/courses/oracle-sql-learning-by-example
Views: 2755 etldeveloper
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: 14408 Caleb Curry
Oracle SQL Tutorial 23 - Intro to Data Types
 
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Every column within a table has to be given what is known as a datatype. A data type is a fairly simple concept when you dissect the word. It is literally the type of data. Why do we use types, though? The biggest benefit is so that Oracle knows how to interpret and work with our data. It also makes the database better at rejecting incorrect data. If we had to concept of a data type, there would be a lot more work involved in forcing data to be of the right format. It would also be harder for us to get the database to treat the data in the correct way. In addition to this, a database can optimize storage and performance for a column if everything is of the same data type. Because of this, each column can only support one data type. There are numerous different data types in Oracle and it helps us if we categorize them. The first types of datatypes we should learn about are: String, Numeric, Temporal Now, there are few more categories we could make, but these are the main ones. We will worry about the other ones another day as I am only introducing the topic. A string data type is anything within quotes. Most databases use single quotes for string data. Inside of the quotes can be any number of characters. What is a character? Think of any letter, number, or symbol you can type. Some people call these letters, numbers, and symbols alphanumeric. Numeric data type includes only numbers. These data types are often used for data that you plan on using for mathematical calculations. Temporal data types are data types that are used for dates and times. Now, each data type is probably going to have some options you'll need to worry about, but one that comes up with every data type is storage. The reason we need to consider storage is because we may end up with millions of rows in a table and the difference between a few bytes for each row will make a huge difference when we look at the whole picture. When a data type gives you the option of size, you will want to a size that will be able to hold what you need, but nothing more. In the upcoming videos we are going to discuss the available data types in more detail. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support 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: 7247 Caleb Curry
Characters in a computer - Unicode Tutorial (UTF-32 & UTF-16)(2/3)
 
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This tutorial talks about some basic aspects of unicode using the examples of utf-32 and utf-16 encodings.
Views: 59954 dizauvi