Question : How can I set a GUID column to ROWGUID using T-SQL?

I have a source table with a primary key column that is a guid and is set as rowguid when the table was created. I want to duplicate this table using a select-into command and then perform some actions on it and then drop the original table and rename this clone to the name of the original and continue. I can use T-SQL to add the indexes and defaults back to the table but I can't figure out the syntax to set the column back to ROWGUID. Does anyone know how to do it?

Answer : How can I set a GUID column to ROWGUID using T-SQL?

This should do what you're after :o)

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/* To prevent any potential data loss issues, you should review this script in detail before running it outside the context of the database designer.*/
BEGIN TRANSACTION
SET QUOTED_IDENTIFIER ON
SET ARITHABORT ON
SET NUMERIC_ROUNDABORT OFF
SET CONCAT_NULL_YIELDS_NULL ON
SET ANSI_NULLS ON
SET ANSI_PADDING ON
SET ANSI_WARNINGS ON
COMMIT
BEGIN TRANSACTION
GO
ALTER TABLE dbo.tablename ALTER COLUMN columnname
	ADD ROWGUIDCOL
GO
COMMIT

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