MySQL触发器、事件、事务触发器事件事务
触发器添加触发器：DELIMITER $$-- 命名习惯：触发表_before/after_触发的SQL语句类型CREATE TRIGGER payments_after_insert AFTER INSERT ON payments -- BEFORE/AFTER INSERT/UPDATE/DELETE ON FOR EACH ROW -- 触发频率语句BEGIN UPDATE invoices SET payment_total =
