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Is column Identity or not?
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General information
Forum:
Microsoft SQL Server
Category:
Other
Environment versions
SQL Server:
SQL Server 2008
Miscellaneous
Thread ID:
01549483
Message ID:
01549485
Views:
33
>>Hi,
>>
>>What would be the TSQL syntax to check if a column is set to be an Indenity column (Is Identity = Yes)? And if No, how to do set the column in Identity Yes in code?
>>
>>TIA
>
>Sys.columns has IsIdentity bit column, e.g.
>
>if exists (SELECT name, is_identity
>FROM sys.columns
>WHERE [object_id] = object_id('items')
>and is_identity = 1)
>
>print 'Table Items has identity column'
>
>(If you know the column name, just check it using a similar script).
>
>If you want to make the column to be identity, you need to re-create the table (e.g. if you don't want to preserve current values, you can do
>
>select identity (int,1,1) as NewIdentityColumn, col1, col2, ... 
>into myNewTable
>from myTable
The code (above that checks if a table has identity) works. How do I change it if I want to include the column name. That is, if I want to know if a certain column in table 'items' is identity?

On the last point, I do want to preserve the current value in the column before making it an identity. From this point, the column value will be incremented then. So I do not want to recreate the table.

Thank you for your help.

UPDATE. I know that on my first question I just need to specify the name of the column in the WHERE. Got it.
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