Question

I have two tables, one parent and one child table. Child will have many rows for parent_id. Both table has status column. Possible values are Active and Deleted.

I want to do this. If for a parent id all children have Deleted status, have to mark parent also as Deleted from Active status. Can it be done in single update query?

Thanks in advance.

Answer 1

How about something like this?

UPDATE parent_table pt SET deleted = 'Y' WHERE deleted = 'N' AND id NOT IN
    (SELECT parent_id FROM child_table ct WHERE deleted = 'N' AND ct.parent_id = pt.id)