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How can I disable and re-enable the IDENTITY property on a table column using T-SQL.

Posted on 2004-08-30
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Last Modified: 2008-01-09
I would like to be able to disable and re-enable the identity property on a column using T-SQL. Here is my sample table:

CREATE TABLE [dbo].[tblTestIDENT] (
      [Col1] [int] IDENTITY (1, 1) NOT NULL ,
      [Col2] [varchar] (50) NULL
) ON [PRIMARY]
GO

What effect would this have if I have say 100 million records in the table?
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Question by:DeMyu
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Expert Comment

by:ill
ID: 11931355
SET IDENTITY_INSERT [tblTestIDENT] ON
insert into tblTestIDENT (col1, col2) values (10, 'test1')
insert into tblTestIDENT (col1, col2) values (1001, 'test2')
SET IDENTITY_INSERT [tblTestIDENT] OFF
insert into tblTestIDENT (col2) values ( 'test3')
select * from [tblTestIDENT]
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Author Comment

by:DeMyu
ID: 11931847
Thank you for your reply. This does not actually remove the identity property of the column in Enterprise Manager. Is there a way to do this in T-SQL such that when I go into EM I wouldn't see the property on the column. I have to do this on a table with about 70 million rows.

Thanks
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Accepted Solution

by:
ill earned 500 total points
ID: 11932089
i'm afraid, you need to recreate table. here is a useful link for you:
http://www.examnotes.net/archive79-2002-7-47264.html
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