Question

How will you add two columns coll and col2(composite key) as primary key to a relation?

विकल्प

• Alter table table_name add primary_key co11, co12;

• Alter table table_name add primary key( co11, co12);

• Add primary key(co11, co12) alter table table_name;

• Alter table table_name add primary_key(co11, co12);

Answer 1

Alter table table_name add primary key( co11, co12);