How do I add auto_increment to a column in SQL Server 2008

Question

I am using SQL Server 2008 and a primary key of a database table I am using is not an IDENTITY column (not sure why). I need to change that.

I am in SQ

Answer 1

Remove the default constraint of column Trans_ID first. Then you can set Is Identity to Yes in the designer.

This is properties for column Trans_ID in your table AR_Transactions. (Is Identity) is disabled:

Remove the default constraint and (Is Identity) is no longer disabled:

Set to yes and save. Default Value or Binding is disabled instead: