MySQL DELETE触发器
CREATE TRIGGER deleteorder BEFORE DELETE ON ordersFOR EACH ROWBEGIN INSERT INTO archive_orders(order_num, order_date, cust_id) VALUES(OLD.order_num, OLD.order_date, OLD.cust_id);END;在任意订单被删除前将执行此触发器。它使用一条INSERT语句将OLD中的值（要被删除的订单）保存到一个名为archive_ord...
