Question

I am trying to execute the following query in oracle but not able to form it here
user_id = 561 in x1_table. The query looks like

delete from x1_table where id in (select id from y1_table where actual_id=123 )
and user_id of x1_table should not be a part of select owner_id from y1_table

Answer 1

    delete x from x1_table x 
    where x.user_id = 123 and
    x.id in (select id from y1_table where actual_id = 123 ) and 
    x.user_id not in ( select owner_id from y1_table );

Since we have column ‘id’ common in both the tables we can frame query using join

    delete x from x1_table x join y1_table y
    on x.id = y.id
    where x.user_id = 789 and
    y.actual_id = 123 and
    x.user_id != y.owner_id;