Comments on: SQL SERVER – Three T-SQL Script to Create Primary Keys on Table http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/ Notes of a SQL Server MVP and Database Administrator Sat, 21 Nov 2009 05:54:09 +0000 http://wordpress.com/ hourly 1 By: SQLAuthority News - Best Articles on SQLAuthority.com Journey to SQL Authority with Pinal Dave http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-47254 SQLAuthority News - Best Articles on SQLAuthority.com Journey to SQL Authority with Pinal Dave Tue, 24 Feb 2009 12:11:12 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-47254 [...] SQL SERVER - Three T-SQL Script to Create Primary Keys on Table [...] [...] SQL SERVER – Three T-SQL Script to Create Primary Keys on Table [...]

]]> By: Imran Mohammed http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-45719 Imran Mohammed Mon, 19 Jan 2009 04:50:17 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-45719 @Zubair. There are only few situations where you can add a column 1. With not null contraint 2. With no default constraint. First of all this does not even make sense to do something like this, it will definitely not have any business value. Anyways here are these two ways to do it. 1. Definitely you can add a column to a table , with not null and not default constraint, but the table has to be empty. There has to be no data in the table, this can be done with T-SQL Script. 2. If you have data in the table and you still want to add a column with not null constraint and with out default constraint. You can add an identity column, unfortunately you cannot add an identity column with T-SQL script , you have to use SSMS. If you say, No, I have data already in the table, and still want to add a column to the table with not null, not default constraint, then you decide what values should go into previous records for this new column ??? Think logically Hope this helps, IM. @Zubair.

There are only few situations where you can add a column
1. With not null contraint
2. With no default constraint.

First of all this does not even make sense to do something like this, it will definitely not have any business value.

Anyways here are these two ways to do it.

1. Definitely you can add a column to a table , with not null and not default constraint, but the table has to be empty. There has to be no data in the table, this can be done with T-SQL Script.

2. If you have data in the table and you still want to add a column with not null constraint and with out default constraint. You can add an identity column, unfortunately you cannot add an identity column with T-SQL script , you have to use SSMS.

If you say, No, I have data already in the table, and still want to add a column to the table with not null, not default constraint, then you decide what values should go into previous records for this new column ???

Think logically

Hope this helps,
IM.

]]> By: ZUBAIR ALAM http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-45708 ZUBAIR ALAM Sun, 18 Jan 2009 16:59:15 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-45708 hello pinal sir, i want to add a column of NOT NULL type using ALTER TABLE statement how can i do it. also i want to add this column without default constraint waiting for ur reply thanks in advance!!!!!!! hello pinal sir,

i want to add a column of NOT NULL type using ALTER TABLE statement
how can i do it.
also i want to add this column without default constraint
waiting for ur reply
thanks in advance!!!!!!!

]]> By: Karthick http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-41823 Karthick Wed, 20 Aug 2008 13:25:55 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-41823 hello sir I have plan to do some project in inventary model for this I have created my database in sql 2005 as by back-end and c#.net is my front end for this i would like to know difference between the sql scripting language and ordinary database language plz help me.............. hello sir
I have plan to do some project in inventary model for this I have created my database in sql 2005 as by back-end and c#.net is my front end for this i would like to know difference between the sql scripting language and ordinary database language plz help me…………..

]]> By: kiran http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-31731 kiran Tue, 08 Jan 2008 13:09:34 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-31731 it is very useful to beginers it is very useful to beginers

]]> By: Russell http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-19902 Russell Thu, 15 Nov 2007 04:06:28 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-19902 Thanks :-) Thanks :-)

]]> By: vaibhav http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-17114 vaibhav Fri, 02 Nov 2007 07:31:41 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-17114 ur Advice is Valuable...DBA ur Advice is Valuable...DBA Do let me know presently m working in a bank as a Datavbase Administrator for Sql server 2005 though i dont have very much to do even nothing to explore my skills here .../.... i m trying to move on to devlopement company as soon as possible here i feel like standstill ......meanwhile do u think that i shud carry on with this job look though i m learning -----------indexing,Physical and logical data modeling-----Performance tunning of Queris and Database ,clustring knowledge.Troubleshooting of Queris and Procedures. at my own skills.....m only doing some backup statgies automating backup's and maintainance plan and Using Dbcc commands replication and mirroring etc... Do you think that it ll count as a experience for switching off to next company.... Please Plea advice me ...... Vaibhav mathur ur Advice is Valuable…DBA
ur Advice is Valuable…DBA
Do let me know presently m working in a bank as a Datavbase Administrator for Sql server 2005 though i dont have very much to do even nothing to explore my skills here …/…. i m trying to move on to devlopement company as soon as possible here i feel like standstill ……meanwhile do u think that i shud carry on with this job look though i m learning ———–indexing,Physical and logical data modeling—–Performance tunning of Queris and Database ,clustring knowledge.Troubleshooting of Queris and Procedures. at my own skills…..m only doing some backup statgies automating backup’s and maintainance plan and Using Dbcc commands replication and mirroring etc…

Do you think that it ll count as a experience for switching off to next company….

Please Plea advice me ……

Vaibhav mathur

]]> By: Ashutosh http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-16974 Ashutosh Thu, 01 Nov 2007 06:46:58 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-16974 Hello Sir, Wish U Very Very Happy Diwali I Am Ashutosh Here Sir I Also Become a MCTS.Net & DBA so please can U Suggest Me Which books i should be read Thank You Sir Ashutosh Bagul Hello Sir,

Wish U Very Very Happy Diwali

I Am Ashutosh Here Sir I Also Become a MCTS.Net & DBA so please can U Suggest Me Which books i should be read

Thank You Sir
Ashutosh Bagul

]]> By: Amit Srivastrava http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-16378 Amit Srivastrava Thu, 25 Oct 2007 12:19:13 +0000 http://blog.sqlauthority.com/2007/10/16/sql-server-three-t-sql-script-to-create-primary-keys-on-table/#comment-16378 Hello Sir, I am an aspiring DBA can u pls suggest me a book from where i can learn to administer both SQL Server 2005 and Oracle. Thanking you in advance. Amit Hello Sir,

I am an aspiring DBA can u pls suggest me a book from where i can learn to administer both SQL Server 2005 and Oracle.

Thanking you in advance.

Amit

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