MySQL 触发器的定义
-- Insert DELIMITER $$ USE `testdatabase`$$ DROP TRIGGER /*!50032 IF EXISTS */ `Trigger_XXX_INSERT`$$ CREATE /*!50017 DEFINER = ‘root‘@‘%‘ */ TRIGGER `Trigger_XXX_INSERT` AFTER INSERT ON `TB_XXX` FOR EACH ROW BEGIN DECLARE newStatus INT; SET newStatus = NEW.`Status`; -- 省略do something END; $$ DELIMITER ; -- Update DELIMITER $$ USE `testdatabase`$$ DROP TRIGGER /*!50032 IF EXISTS */ `Trigger_XXX_UPDATE`$$ CREATE /*!50017 DEFINER = ‘root‘@‘%‘ */ TRIGGER `Trigger_XXX_UPDATE` BEFORE UPDATE ON `TB_XXX` FOR EACH ROW BEGIN DECLARE oldStatus INT; DECLARE newStatus INT; SET oldStatus = OLD.`ConsultationStatus`; SET newStatus = NEW.`ConsultationStatus`; IF (newStatus <> oldStatus) THEN -- continue do something END IF; END; $$ DELIMITER ;
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