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I have to add a auto_Increment primary key column to the table. I used this script to create but its doing fine. but one thing is thtat I have alredy have a primary key in that table. so its throwing an error.
how to remove alredy existing primary and making a new auto_increamtn column has a primary key.
ALTER TABLE ABCD ADD ABCD_Id int NOT NULL IDENTITY (1,1) PRIMARY KEY
thanks
You need to drop the PRIMARY key constraint first, something like