How to add auto-increment primary key in a existing table?

 Posted by vishalneeraj-24503 on 3/6/2014 | Category: Sql Server Interview questions | Views: 1108 | Points: 40

First assign Identity to a column then assign primary key to that column.

For Example:-
alter table project_master add project_id int identity;
Now,we can assign project_id column to primary key as below:-
alter table project_master add constraint pk_project_id_project_master primary key(project_id);

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