delimiter $ CREATE TRIGGER testref AFTER INSERT ON akolastock FOR EACH ROW BEGIN UPDATE akolastock SET bal = op_qtlkggms + qtlkggms END$ delimiter ; this is my trigger it created when i m trying to insert record in this table it will generate an error #1442 - Can't update table 'akolastock' in stored function/trigger because it is already used by statement which invoked this stored function/trigger.