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SQL Server Management Studio- setiing an Identity

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Last Modified: 2012-05-10
I've created a table but want to add an identity column to it.
How is this done through the management studio? (SQL Server 2008)
(The Identity specification is disabled and set to No for all columns).
Cheers
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Top Expert 2011

Commented:
ALTER TABLE YourTable ALTER COLUMN Id IDENTITY (200,1)


Top Expert 2011

Commented:
above assumes that the colum already exists.

If that isn't the case, then this will add a column and make it identity seed:

alter table yourTable
add  id int not null Identity(1,1)
Commented:
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Commented:
If the column you want to use already has data in it you will not be able to use it as an Identity column, you will need to create a new column, and it will have to be an int column and it may not allow nulls.
SpikeSoftware Developer

Author

Commented:
Worked- although how do you do it through the table design properties?
Guy Hengel [angelIII / a3]Billing Engineer
CERTIFIED EXPERT
Most Valuable Expert 2014
Top Expert 2009

Commented:
you cannot ALTER a column to change from non-identity to identity.

you have to drop and recreate the column for that.

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