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05.09.2008 at 08:44AM PDT, ID: 23389822
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SET IDENTITY_INSERT [tblName] OFF does not work

Tags: t-SQL
I have a large table with an identity column.  I need to truncate and restore the table from time to time keeping the same identity insert values for that column rather than reseeding it.

I have used SET IDENTITY_INSERT [tblName] OFF before restoring the data.  I thought this was just what that staement is for but It won't let me add my own values to the identy column.  The values I want to add are unique.

Any ideas?
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Question Stats
Zone: Microsoft
Question Asked By: jamesrbarnes
Solution Provided By: angelIII
Participating Experts: 2
Solution Grade: B
Views: 12
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05.09.2008 at 08:57AM PDT, ID: 21534168

Rank: Master

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05.09.2008 at 11:35AM PDT, ID: 21535396

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05.09.2008 at 11:56AM PDT, ID: 21535545

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05.09.2008 at 02:06PM PDT, ID: 21536409

Rank: Genius

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05.09.2008 at 08:57AM PDT, ID: 21534168

Rank: Master

You want it "On" as that then allows explicit values to be inserted.
 
05.09.2008 at 11:35AM PDT, ID: 21535396
I tried that, too and I get the error message:

Cannot update identity column 'ID'
 
05.09.2008 at 11:56AM PDT, ID: 21535545

Rank: Master

Could you try a simple example like this:

SET IDENTITY_INSERT mytable ON
Go

Insert Into mytable( identitycolumn, othercolumns)
  Values( 3, 'xyz' )
Go

If that works, what are you doing different that is failing?  If it doesn't work, please post sql and exact error message.  I notice your error message above implies an update but your question sounds like an insert without updates.
 
05.09.2008 at 02:06PM PDT, ID: 21536409

Rank: Genius

you cannot UPDATE identity column, only INSERT new rows with SET IDENTITY_INSERT on.
so, if you wanted to "update" a row, you have to insert a copy of it with the new id value, and then delete the old row.s
Accepted Solution
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628