subquery - MySQL: sub query returns more than one row -


i need delete rows responses table after questions table has been updated error: sub query returns more 1 row. there way around working?

create trigger delete_responses after update on  questions each row  begin  if new.active != old.active  delete responses option_id = ( select option_id options question_id = old.question_id);

change = = any or in:

create trigger delete_responses after update on  questions each row  begin  if new.active != old.active  delete responses option_id in ( select option_id options question_id = old.question_id);

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