Adding column with primary key in existing table

Question

I am trying to add primary key to newly added column in existing table name Product_Details.

New Column added: Product_Detail_ID (int

Answer 1

You are getting the error because you have existing data that does not fullfill the constraint.

There are 2 ways to fix it:

• clean up the existing data before adding the constraint
• add the constraint with the "WITH NOCHECK" option, this will stop sql server checking existing data, only new data will be checked