Hi

Incase I want to check out the presence of two columns in a table how do I do that .

select (ordernum,date ) from table_name A where (order_num,date) in (Select (order_num,date) from table_name B.

Gives me an error
and

if I write

select (ordernum,date ) from table_name A where exists (Select (ordernum,date ) from table_name B) gives me all orders and treats order_num and date as seperate columsn .

Please help

regards