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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: 5974 Caleb Curry
Difference between char,nchar,varchar,nvarchar in SqlServer
 
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Compleate diffrence between char,nchar,varchar,nvarchar in SqlServer
Views: 16180 Tech mohan
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: 3594 Rishabh Jain
DIFFERENCE BETWEEN CHAR AND VARCHAR2 DATATYPE IN ORACLE SQL
 
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This video tutorial explains the difference between similar looking and used char datatype and varchar2 datatypes with an simple example. This video will answer the question such as how is the data internally stored differently for char and vacchar2 datatype. Also why is varchar2 much better option to be used than char data type is explained. 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 replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 in and exists : https://youtu.be/REX4IjRYlFw rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 3471 Kishan Mashru
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: 🎈 Training with Real-Time Experts 🎈 Industry Specific Scenario’s 🎈 Flexible Timings 🎈 Soft Copy of Material 🎈 Share Videos of each and every session. -------------------------- 💡 Please write back to us at 📧 [email protected]/ 📧 [email protected] or Call us at the 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/nareshitek ► Follow us on Linkedin: https://goo.gl/CRBZ5F ► Follow us on Instagram: https://goo.gl/3UXYK3
Views: 19587 Naresh i Technologies
MSSQL - Difference between varchar and nVarchar
 
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Simple example that shows the difference between varchar and nvarchar - приклад з Олегом Скрипкою:)
Views: 6068 Vis Dotnet
11. CHAR, VARCHAR and TEXT Data Type in SQL (Hindi)
 
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Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 39623 Geeky Shows
9. What are the Difference Between VARCHAR and VARCHAR2 in Oracle Database
 
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What are the Difference Between VARCHAR and VARCHAR2 in Oracle Database
Oracle SQL Tutorial 29 - NCHAR Part 1
 
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NCHAR is another data type available in Oracle database. This data type is very similar to the char data type with some key differences. NCHAR is also known as the national character set. This is a data type that allows us to store Unicode characters. It is really recommended that you watch the two videos over Unicode and UTF-8 because this video is going to talk a lot about it. Why is it that we have an entire data type dedicated to storing Unicode? That will be easily understood once we understand how character sets and encodings are applied to Oracle. They are applied at the database level. That means that you have a character set that applies to the entire database. This is in contrast to some database management systems that allow you to apply a data type at the table and column level. For example, in MySQL you can make a table have a character set, and make a specific column in that table a different character set. That means we can customize everything at the expense of adding potential complexity and confusion. Oracle does not work that way. In Oracle, we define one character set for the entire database. The problem with defining a character set for the entire database is that it may not be the character set we want to use for everything. That is where the NCHAR column comes in. The NCHAR column allows us to have a Unicode column inside of a database that does not use Unicode as the default character set. That is important because it is very often that we want to use Unicode but we may not need to use it for everything, for example if that application is working with ASCII nearly all of the time. If you are using Unicode for the database, then NCHAR is not going to be needed and should not be used. This data type is not as widely accepted, so only use it if you absolutely need to, specifically when you need to store Unicode in a non-Unicode database. Additionally, there is some controversy when it comes to whether or not you should use the CHAR and NCHAR data types in Oracle at all. We will discuss why in an upcoming video. In the next video we are going to go over some specific character sets that Oracle can use. See you then! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppor 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: 4438 Caleb Curry
Why is varchar(max) getting truncated?
 
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Have you ever tried to fit more than 8000 characters into a variable defined as varchar(max) (or nvarchar(max)) only to see your data get truncated? Today we explore why this happens and how to fix it, allowing you to create really long SQL strings. Related blog post with example code: https://bertwagner.com/2018/05/15/why-is-my-varcharmax-variable-getting-truncated/ Twitter: https://twitter.com/bertwagner Instagram: https://www.instagram.com/bertwagner/ https://www.instagram.com/sqlwithbert/ Facebook: https://www.facebook.com/SQLWithBert
Views: 512 Bert Wagner
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: 7701 Edward Kench
Every VARCHAR2(N) Declaration a Bug!? (HC-4)
 
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That's right. VARCHAR2 declarations mean that you have to provide an "N" or constraint on the size of the variable. If you have such declarations all over your code, that's a form of hard-coding and you are likely to get hammered by VALUE_ERROR exceptions. This video shows you how to fix this problem, focusing in on the very helpful SUBTYPE feature of PL/SQL. ============================ Practically Perfect PL/SQL with Steven Feuerstein 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.
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: 293 Prabhat Sahu
SQL Server Tutorial - Difference between char, nchar, varchar, nvarchar DataTypes in SqlServer
 
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In this video you will learn about difference between char, nchar, varchar and nvarchar DataTypes in SqlServer in Urdu and Hindi.
Views: 5067 IT4Solutions
how to auto increment varchar in sql server
 
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how to auto increment varchar in sql server
Views: 15406 Kannababu Banna
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: 🎈 Training with Real-Time Experts 🎈 Industry Specific Scenario’s 🎈 Flexible Timings 🎈 Soft Copy of Material 🎈 Share Videos of each and every session. -------------------------- 💡 Please write back to us at 📧 [email protected]/ 📧 [email protected] or Call us at the 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/nareshitek ► Follow us on Linkedin: https://goo.gl/CRBZ5F ► Follow us on Instagram: https://goo.gl/3UXYK3
Views: 12812 Naresh i Technologies
What Common Data TypesvUsed in SQL Server
 
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In this post we'll cover the seven common data types used in SQL Server. They include: INT, DATETIME, VARCHAR, NVARCHAR, DECIMAL, FLOAT, and BIT.
Views: 376 Kris Wenzel
SQL Tutorial - PRIMARY KEY CONSTRAINTS
 
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Another fantastic SQL Tutorial brought to you by BeardedDev. In this video we look at what Primary Keys are and how to add Primary Keys within Create Table statements or Alter Table statements: https://youtu.be/DJ054rHGhRw If you are new to primary keys this tutorial will help you know how to add primary keys by using object explorer and tsql. If you want to know what a composite primary key is watch this video: https://youtu.be/DJ054rHGhRw If you are interested in learning how to add constraints to tables in SQL Server check out this link: https://youtu.be/bfBnZKf2EGg For more great instructional videos on data development or business intelligence click here to see all the videos available on my channel: https://www.youtube.com/channel/UCWczzX6DyFV2KOYP_-CEZUA/videos SQL: IF OBJECT_ID(N'dbo.Customers', N'U') IS NOT NULL DROP TABLE dbo.Customers; GO CREATE TABLE dbo.Customers ( CustomerId INT IDENTITY(1, 1) NOT NULL , FirstName NVARCHAR(50) NOT NULL , MiddleName NVARCHAR(50) NOT NULL , LastName NVARCHAR(50) NOT NULL , DOB DATE NULL , Email NVARCHAR(100) NULL , HomeTel VARCHAR(20) NULL , MobileTel VARCHAR(20) NULL , [1stLineAddress] VARCHAR(100) NULL , City INT NULL , County INT NULL , Country INT NULL ) IF OBJECT_ID(N'dbo.Customers', N'U') IS NOT NULL DROP TABLE dbo.Customers; GO CREATE TABLE dbo.Customers ( CustomerId INT IDENTITY(1, 1) NOT NULL CONSTRAINT PK_Customers_CustomerID PRIMARY KEY (CustomerId) , FirstName NVARCHAR(50) NOT NULL , MiddleName NVARCHAR(50) NOT NULL , LastName NVARCHAR(50) NOT NULL , DOB DATE NULL , Email NVARCHAR(100) NULL , HomeTel VARCHAR(20) NULL , MobileTel VARCHAR(20) NULL , [1stLineAddress] VARCHAR(100) NULL , City INT NULL , County INT NULL , Country INT NULL ) ALTER TABLE dbo.Customers ADD CONSTRAINT PK_Customers_CustomerId PRIMARY KEY (CustomerId) SELECT * FROM sys.key_constraints Don't forget to subscribe to the channel and let me know your thoughts in the comments section below.
Views: 272 BeardedDev
SQL Tutorial - 7: Data-Types in SQL (Part-2)
 
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In this tutorial we';; check out the data type options we have available for use in SQL. We'll talk about Bigint, int, smallint, tinyint, decimal, number, float, char, varchar, blob, datetime, date, time and year.
Views: 102087 The Bad Tutorials
MSSQL -  Fix Error   Operand data type varchar is invalid for sum operator
 
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More info http://howtodomssqlcsharpexcelaccess.blogspot.ca/2018/02/mssql-fix-error-operand-data-type.html
Views: 670 Vis Dotnet
Part 6   Transform rows into columns in sql server
 
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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/2014/06/part-6-transform-rows-into-columns-in.html This is another common sql server interview question. We will be using Countries table in this example. SQL to create the table Create Table Countries ( Country nvarchar(50), City nvarchar(50) ) GO Insert into Countries values ('USA','New York') Insert into Countries values ('USA','Houston') Insert into Countries values ('USA','Dallas') Insert into Countries values ('India','Hyderabad') Insert into Countries values ('India','Bangalore') Insert into Countries values ('India','New Delhi') Insert into Countries values ('UK','London') Insert into Countries values ('UK','Birmingham') Insert into Countries values ('UK','Manchester') Here is the interview question. Write a sql query to transpose rows to columns. Using PIVOT operator we can very easily transform rows to columns. Select Country, City1, City2, City3 From ( Select Country, City, 'City'+ cast(row_number() over(partition by Country order by Country) as varchar(10)) ColumnSequence from Countries ) Temp pivot ( max(City) for ColumnSequence in (City1, City2, City3) ) Piv
Views: 203444 kudvenkat
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: 4121 R.gowtham Kumar
CHAR vs VARCHAR
 
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Views: 3363 Rocky Jagtiani
Audit table changes in sql server
 
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sql server 2008 ddl trigger audit sql server table changes tracking In this video we will discuss, how to audit table changes in SQL Server using a DDL trigger. Table to store the audit data Create table TableChanges ( DatabaseName nvarchar(250), TableName nvarchar(250), EventType nvarchar(250), LoginName nvarchar(250), SQLCommand nvarchar(2500), AuditDateTime datetime ) Go The following trigger audits all table changes in all databases on a SQL Server. CREATE TRIGGER tr_AuditTableChanges ON ALL SERVER FOR CREATE_TABLE, ALTER_TABLE, DROP_TABLE AS BEGIN DECLARE @EventData XML SELECT @EventData = EVENTDATA() INSERT INTO SampleDB.dbo.TableChanges (DatabaseName, TableName, EventType, LoginName, SQLCommand, AuditDateTime) VALUES ( @EventData.value('(/EVENT_INSTANCE/DatabaseName)[1]', 'varchar(250)'), @EventData.value('(/EVENT_INSTANCE/ObjectName)[1]', 'varchar(250)'), @EventData.value('(/EVENT_INSTANCE/EventType)[1]', 'nvarchar(250)'), @EventData.value('(/EVENT_INSTANCE/LoginName)[1]', 'varchar(250)'), @EventData.value('(/EVENT_INSTANCE/TSQLCommand)[1]', 'nvarchar(2500)'), GetDate() ) END In the above example we are using EventData() function which returns event data in XML format. Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/audit-table-changes-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/audit-table-changes-in-sql-server_12.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 Full SQL Server Course https://www.youtube.com/playlist?list=PL4cyC4G0M1RQ_Rm52cQ4CcOJ_T_HXeMB4 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: 43448 kudvenkat
PL/SQL Tutorial: Differences Between PLS_INTEGER and BINARY_INTEGER
 
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Differences Between PLS_INTEGER and BINARY_INTEGER SQL Tutorial SQL Tutorial for beginners PLSQL Tutorial PLSQL Tutorial for beginners PL/SQL Tutorial PL SQL Tutorial PL SQL Tutorial for beginners PL/SQL Tutorial for beginners Oracle SQL Tutorial
Views: 672 TechLake
Ahmed Jassat - Oracle SQL Developer 17.3 DBA Functions made easy
 
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Ahmed Jassat - Oracle SQL Developer 17.3 DBA Functions made easy new features
Views: 203 Ahmed Jassat
MySQL 26 - VARCHAR Data Type
 
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Varchar is very similar to CHAR in that it is used to store strings, but there are some pretty big differences. The first difference is that when you store data less than the max it does not pad it with spaces to make it fit. The benefit in this is that you will save storage. The downside to this is that now MySQL is going to have to keep track of how many characters you have. To do this, each value is going to have an additional byte or two that MySQL can use. The max length is 65535 bytes. That is per value in that column! But you have to keep in mind encodings. If your characters are encoded with something such as UTF-8, each character can take up multiple bytes. The max size for a character in this case is 3 bytes. That means that we really can't store that many characters. Additionally, MySQL has a row limit of 65535 bytes (potential bytes…meaning declared sizes). What does this mean? It means that if you make this too big, you are not going to be able to create other columns. Earlier I said that there will be an additional byte or two for each value you put into this column. The purpose of this is to keep track of how long the string is. Why one or two and not one? The reason being is because with one byte we can only count to 255. if we want to keep track of bytes after that we need two bytes. This means that we actually can't store quite 65535 bytes. Realistically, we can't store that much because we have to store the length of the string, and each character can take up to 3 bytes which can push us over the row limit. This means the real max is a little less than a third of that. Not every character is going to take up 3 bytes, but MySQL assumes it will as to not cut you short. This is slightly different than CHAR because char you can store up to 255 characters, not bytes. Even if you use an encoding where some characters take up multiple bytes, you can still store 255 of them. Remember that reason for this is that VARCHAR is subject to the row-limit. MySQL will not let you go past the max and will tell you the appropriate max, so don't worry about it too much. You should try not to push your limits. Plus, most of the time you will not come even close to the max for most columns. Should you use the max? Varchar will only store what is needed to store a value, but you should still try to have the max size no more than what is needed. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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: 8425 Caleb Curry
Data types in SQL Server  - Part 5 Tamil
 
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Subscribe to IT PORT : https://www.youtube.com/c/itport28 SQL Server Tutorial in Tamil : https://www.youtube.com/playlist?list=PLouAaeZ4xQ64enJDwWVvN3KduuZRlUrb3 SQL Server Concepts in Tamil : https://www.youtube.com/playlist?list=PLouAaeZ4xQ67kdNIByJKAGBIBhor_h4Hs SQL Server Analytic Functions in Tamil : https://www.youtube.com/playlist?list=PLouAaeZ4xQ65XIU5azEUgLVrBKEl-jWMV SQL Server Tutorial : https://www.youtube.com/playlist?list=PLouAaeZ4xQ66AYrzPtxt2SeeR4UABcBcO SQL Server Concepts : https://www.youtube.com/playlist?list=PLouAaeZ4xQ66zRe8-nDDy-YHY2o0rmbn4 SQL Server Analytic Functions : https://www.youtube.com/playlist?list=PLouAaeZ4xQ64hTsEdhLsVBquE1vERWngX In SQL Server, each column, local variable, expression, and parameter has a related data type. A data type is an attribute that specifies the type of data that the object can hold: integer data, character data, monetary data, date and time data, binary strings, and so on. There are 7 Data type Categories available: a) Exact numerics b) Approximate numerics c) Date and time d) Character Strings e) Unicode Character Strings f) Binary Strings g) Other data types Explained in Tamil
Views: 750 IT Port
Dynamic SQL in Stored Procedure
 
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In this video we will discuss, using dynamic sql in a stored procedure and it's implications from sql injection perspective. We will discuss performance implications of using dynamic sql in a stored procedure in a later video. Text version of the video http://csharp-video-tutorials.blogspot.com/2017/04/dynamic-sql-in-stored-procedure.html Slides http://csharp-video-tutorials.blogspot.com/2017/04/dynamic-sql-in-stored-procedure_11.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 SQL Server Tutorial Videos https://www.youtube.com/playlist?list=PL08903FB7ACA1C2FB 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 Consider the following stored procedure "spSearchEmployees". We implemented this procedure in Part 139 of SQL Server tutorial. This stored procedure does not have any dynamic sql in it. It is all static sql and is immune to sql injection. Create Procedure spSearchEmployees @FirstName nvarchar(100) = NULL, @LastName nvarchar(100) = NULL, @Gender nvarchar(50) = NULL, @Salary int = NULL As Begin Select * from Employees where (FirstName = @FirstName OR @FirstName IS NULL) AND (LastName = @LastName OR @LastName IS NULL) AND (Gender = @Gender OR @Gender IS NULL) AND (Salary = @Salary OR @Salary IS NULL) End Go Whether you are creating your dynamic sql queries in a client application like ASP.NET web application or in a stored procedure, you should never ever concatenate user input values. Instead you should be using parameters. Notice in the following example, we are creating dynamic sql queries by concatenating parameter values, instead of using parameterized queries. This stored procedure is prone to SQL injection. Let's prove this by creating a "Search Page" that calls this procedure. Create Procedure spSearchEmployeesBadDynamicSQL @FirstName nvarchar(100) = NULL, @LastName nvarchar(100) = NULL, @Gender nvarchar(50) = NULL, @Salary int = NULL As Begin Declare @sql nvarchar(max) Set @sql = 'Select * from Employees where 1 = 1' if(@FirstName is not null) Set @sql = @sql + ' and FirstName=''' + @FirstName + '''' if(@LastName is not null) Set @sql = @sql + ' and LastName=''' + @LastName + '''' if(@Gender is not null) Set @sql = @sql + ' and Gender=''' + @Gender + '''' if(@Salary is not null) Set @sql = @sql + ' and Salary=''' + @Salary + '''' Execute sp_executesql @sql End Go Add a Web Page to the project that we have been working with in our previous video. Name it "DynamicSQLInStoredProcedure.aspx". Copy and paste the HTML and code available on my blog at the following link http://csharp-video-tutorials.blogspot.com/2017/04/dynamic-sql-in-stored-procedure.html At this point, run the application and type the following text in the "Firsname" text and click "Search" button. Notice "SalesDB" database is dropped. Our application is prone to SQL injection as we have implemented dynamic sql in our stored procedure by concatenating strings instead of using parameters. ' Drop database SalesDB -- In the following stored procedure we have implemented dynamic sql by using parameters, so this is not prone to sql injecttion. This is an example for good dynamic sql implementation. Create Procedure spSearchEmployeesGoodDynamicSQL @FirstName nvarchar(100) = NULL, @LastName nvarchar(100) = NULL, @Gender nvarchar(50) = NULL, @Salary int = NULL As Begin Declare @sql nvarchar(max) Declare @sqlParams nvarchar(max) Set @sql = 'Select * from Employees where 1 = 1' if(@FirstName is not null) Set @sql = @sql + ' and [email protected]' if(@LastName is not null) Set @sql = @sql + ' and [email protected]' if(@Gender is not null) Set @sql = @sql + ' and [email protected]' if(@Salary is not null) Set @sql = @sql + ' and [email protected]' Execute sp_executesql @sql, N'@FN nvarchar(50), @LN nvarchar(50), @Gen nvarchar(50), @sal int', @[email protected], @[email protected], @[email protected], @[email protected] End Go On the code-behind page, use stored procedure spSearchEmployeesGoodDynamicSQL instead of spSearchEmployeesBadDynamicSQL. We do not have to change any other code. At this point run the application one more time and type the following text in the "Firstname" textbox and click the "Search" button. ' Drop database SalesDB -- Notice "SalesDB" database is not dropped, So in this case our application is not succeptible to SQL injection attack. Summary : Whether you are creating dynamic sql in a client application (like a web application) or in a stored procedure always use parameters instead of concatnating strings. Using parameters to create dynamic sql statements prevents sql injection.
Views: 36358 kudvenkat
Oracle SQL Tutorial 27 - CHAR Part 1
 
03:52
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: 4983 Caleb Curry
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: 5526 hammadshams
Datatypes : Oracle (Sql)
 
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Oracle Datatypes Difference between Char and Varchar Date Number
Views: 80 CodeSmith 001
Oracle 11g Tutorial #2: Different Datatypes of Oracle
 
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Different datatypes of oracle 11g. Varchar2, char, Number , date, BLOB anf CLOB datatypes. Oracle 11g Tutorial #2: Different Datatypes of Oracle . Thanks for watching my videos regularly and motivate me to touch the another milestone. Please subscribe my channel "Learn TechToTech" My Website : www.learnfromrakesh.com My Twitter Account : https://twitter.com/LearnTechtotech My Facebook Account: https://www.facebook.com/LearnTechToTech
Views: 297 Learn TechToTech
MySQL - Diferencia entre CHAR y VARCHAR - Claves autoincrementales
 
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Empezamos a escribir código MySQL para crear nuestra base de datos y nuestras tablas. Explicamos la diferencia entre CHAR y VARCHAR para almacenar cadenas. Aprendemos a declarar una CLAVE PRIMARIA y a declarar enteros autoincrementales como claves primarias. ***** Síguenos en las redes sociales: Twitter ► https://twitter.com/programacionym Facebook ► https://www.facebook.com/programacionymas Suscríbete a nuestro canal: http://bit.ly/SuscribirmePYM ***** Si tienes alguna duda puedes dejar un comentario. Además recuerda dar like y compartir el video. Gracias!
Views: 8146 Programación y más
Introduction to Oracle Database 12c Extended Datatypes
 
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Watch all 6 Free modules on Extended Datatypes at http://skillbuilders.com/Oracle-12c-Extended-Datatypes-Free-Tutorial
Views: 666 SkillBuilders
numeric data types in oracle
 
11:16
numeric data types in oracle
Views: 14 karra sankar
SQLserver Faqs-4
 
14:02
in this video i Explained about char,nchar,varchar,nvarchar in Sqlserver
Views: 11770 Kannababu Banna
Bangla Database Tutorial 11 : Introduction to SQL
 
06:09
ডেটাবেজের উপর আমার সবগুলো ভিডিও পেতে নিচের লিংকে ক্লিক করুন https://www.youtube.com/playlist?list=PLgH5QX0i9K3qLcx9DvVDWmNJ7riPvxzCD সি প্রোগ্রামিং এর উপর আমার অন্যান্য ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3pCMBZcul1fta6UivHDbXvz HSC ICT এর উপর আমার অন্যান্য ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3o8Y-CKhmyodbfHAc9VSVOv java প্রোগ্রামিং এর উপর আমার অন্যান্য ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3oAZUB2QXR-dZac0c9HNyRa Android এর উপর আমার ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3p9xzYLFGdfYliIRBLVDRV5 Theory of computation এর উপর আমার ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3qw5pu16QgnKNj91Rnjoyd0 Compiler এর উপর আমার ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3oWTwTgILA7v9oysoDgkJDg কম্পিউটার নেটওয়ার্কিং এর উপর আমার ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3p5OI88r3ob-otmKqIm_DbS অপারেটিং সিস্টেম এর উপর আমার ভিডিওগুলো দেখতে ক্লিক করুন নিচের লিংকটিতে - https://www.youtube.com/playlist?list=PLgH5QX0i9K3r_SuT0AnOEoElfQQPgkBIq আমার ফেসবুক পেইজে জয়েন করতে ক্লিক করুন নিচের লিংকগুলোতে - https://www.facebook.com/studywithanis/ https://www.facebook.com/anisul2010s
Views: 40489 Anisul Islam
MS SQL 2012 - How to Fix Error Arithmetic overflow error converting int to data type numeric.avi
 
01:20
http://howtodomssqlcsharpexcelaccess.blogspot.ca/2012/03/ms-sql-2012-how-to-fix-error-arithmetic.html
Views: 5011 Vis Dotnet
Batch import data from Oracle tables to SQL Server
 
00:24
Batch import data from Oracle tables to SQL Server, by OracleToMsSql, http://www.withdata.com/oracletomssql/ . Download link: http://www.withdata.com/down/OracleToMsSql.exe .
Views: 2025 Shiji Pan
Sequence object in SQL Server 2012
 
12:22
create sequence in sql server In this video we will discuss sequence object in SQL Server. Sequence object Introduced in SQL Server 2012 Generates sequence of numeric values in an ascending or descending order Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/sequence-object-in-sql-server-2012.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/sequence-object-in-sql-server-2012_26.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 Creating the Incrementing Sequence : The following code create a Sequence object that starts with 1 and increments by 1 CREATE SEQUENCE [dbo].[SequenceObject] AS INT START WITH 1 INCREMENT BY 1 Generating the Next Sequence Value : Now we have a sequence object created. To generate the sequence value use NEXT VALUE FOR clause SELECT NEXT VALUE FOR [dbo].[SequenceObject] Output : 1 Every time you execute the above query the sequence value will be incremented by 1. I executed the above query 5 times, so the current sequence value is 5. Retrieving the current sequence value : If you want to see what the current Sequence value before generating the next, use sys.sequences SELECT * FROM sys.sequences WHERE name = 'SequenceObject' Alter the Sequence object to reset the sequence value : ALTER SEQUENCE [SequenceObject] RESTART WITH 1 Select the next sequence value to make sure the value starts from 1 SELECT NEXT VALUE FOR [dbo].[SequenceObject] Using sequence value in an INSERT query : CREATE TABLE Employees ( Id INT PRIMARY KEY, Name NVARCHAR(50), Gender NVARCHAR(10) ) -- Generate and insert Sequence values INSERT INTO Employees VALUES (NEXT VALUE for [dbo].[SequenceObject], 'Ben', 'Male') INSERT INTO Employees VALUES (NEXT VALUE for [dbo].[SequenceObject], 'Sara', 'Female') -- Select the data from the table SELECT * FROM Employees Creating the decrementing Sequence : The following code create a Sequence object that starts with 100 and decrements by 1 CREATE SEQUENCE [dbo].[SequenceObject] AS INT START WITH 100 INCREMENT BY -1 Specifying MIN and MAX values for the sequence : Use the MINVALUE and MAXVALUE arguments to specify the MIN and MAX values respectively. Step 1 : Create the Sequence object CREATE SEQUENCE [dbo].[SequenceObject] START WITH 100 INCREMENT BY 10 MINVALUE 100 MAXVALUE 150 Step 2 : Retrieve the next sequence value. The sequence value starts at 100. Every time we call NEXT VALUE, the value will be incremented by 10. SELECT NEXT VALUE FOR [dbo].[SequenceObject] If you call NEXT VALUE, when the value reaches 150 (MAXVALUE), you will get the following error The sequence object 'SequenceObject' has reached its minimum or maximum value. Restart the sequence object to allow new values to be generated. Recycling Sequence values : When the sequence object has reached it's maximum value, and if you want to restart from the minimum value, set CYCLE option ALTER SEQUENCE [dbo].[SequenceObject] INCREMENT BY 10 MINVALUE 100 MAXVALUE 150 CYCLE At this point, whe the sequence object has reached it's maximum value, and if you ask for the NEXT VALUE, sequence object starts from the minimum value again which in this case is 100. To improve performance, the Sequence object values can be cached using the CACHE option. When the values are cached they are read from the memory instead of from the disk, which improves the performance. When the cache option is specified you can also specify the size of th cache , that is the number of values to cache. The following example, creates the sequence object with 10 values cached. When the 11th value is requested, the next 10 values will be cached again. CREATE SEQUENCE [dbo].[SequenceObject] START WITH 1 INCREMENT BY 1 CACHE 10 Using SQL Server Graphical User Interface (GUI) to create the sequence object : 1. Expand the database folder 2. Expand Programmability folder 3. Right click on Sequences folder 4. Select New Sequence Next video : Difference between SEQUENCE and IDENTITY in SQL Server
Views: 37181 kudvenkat
Символьные типы данных CHAR и VARCHAR в SQL и базах данных MySQL сервера
 
03:24
В данном видео уроке мы поговорим о символьном типе данных и его реализации в базах данных MySQL сервера. Отметим, что MySQL поддерживает стандартный набор символьных типов данных для SQL, который представлен типами данных CHAR и VARCHAR. Тип данных CHAR в базах данных MySQL севера позволяет хранить строки фиксированной длинны, а тип данных VARCHAR используется в базах данных для хранения строк переменной длины. Также стоит сказать, что количество символов, хранимых в столбцах CHAR и VARCHAR указывается при создании таблицы. Рубрика по базам данных: http://zametkinapolyah.ru/zametki-o-mysql/sqlite/ Рубрика MySQL: http://zametkinapolyah.ru/zametki-o-mysql/server-mysql Паблик блога в ВК: https://vk.com/zametkinapolyah Тематическая группа в ВК: https://vk.com/zametki_bd Помощь проекту: WMR: R28827266698 WMZ: Z293550531456 Яндекс.Деньги: 410011531129223
12. DATE, DATATIME and TIMESTAMP Data Type in SQL (Hindi)
 
02:24
Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 33436 Geeky Shows
Batch export SQL Server CLOB  [(N)TEXT, (N)VARCHAR(MAX)] data from query results to files
 
00:52
Batch export SQL Server [TEXT, NTEXT, VARCHAR(MAX), NVARCHAR(MAX)] (CLOB) data from query results, by SqlLobEditor, http://www.withdata.com/sqllobeditor/ . Download link: http://www.withdata.com/down/SqlLobEditor.exe .
Views: 433 Shiji Pan
84. DECIMAL Data Type in SQL (Hindi)
 
19:18
Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 8386 Geeky Shows
Difference between varchar and char dtatatypes in sql
 
05:20
This video explains difference between varchar and char datatypes
Views: 2536 kwl zerotwonine
Batch import SQL Server [TEXT, NTEXT, VARCHAR(MAX), NVARCHAR(MAX)] (CLOB) data from files
 
00:33
Batch import SQL Server [TEXT, NTEXT, VARCHAR(MAX), NVARCHAR(MAX)] (CLOB) data, by SqlLobEditor, http://www.withdata.com/sqllobeditor/ . Download link: http://www.withdata.com/down/SqlLobEditor.exe .
Views: 1006 Shiji Pan
10. What is the Difference Between Char and Varchar in MySQL ?
 
05:15
What is the Difference Between Char and Varchar in MySQL

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