mysql 觸發器執行個體

測試表1

DROP TABLE IF EXISTS test;                  CREATE TABLE test (    id           bigint(11) unsigned NOT NULL AUTO_INCREMENT,    name         varchar(100) NOT NULL DEFAULT '',    type         varchar(100),  create_time  datetime,    PRIMARY KEY (ID)  ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;  

測試表2

DROP TABLE IF EXISTS test_hisy;                  CREATE TABLE test_hisy (    id           bigint(11) unsigned NOT NULL AUTO_INCREMENT,    name         varchar(100) NOT NULL DEFAULT '',    type         varchar(100),  create_time  datetime,  operation    varchar(100) COMMENT '操作類型',  PRIMARY KEY (ID)  ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;  

insert觸發器

表test新增記錄後，將type值為“1”的記錄同時插入到test_hisy表中（AFTER INSERT：錄入後觸發， BEFORE INSERT：錄入前觸發）

DELIMITER //DROP TRIGGER IF EXISTS t_after_insert_test//CREATE TRIGGER t_after_insert_testAFTER INSERT ON testFOR EACH ROWBEGIN    IF new.type='1' THEN    insert into test_hisy(name, type, create_time, operation)     values(new.name, new.type, new.create_time, 'insert');    END IF;END;//

update觸發器

表test修改時，若type值為“2”則將修改前的記錄同時插入到test_hisy表中（AFTER UPDATE：修改後觸發， BEFORE UPDATE：修改前觸發）

DELIMITER //DROP TRIGGER IF EXISTS t_before_update_test//CREATE TRIGGER t_before_update_testBEFORE UPDATE ON testFOR EACH ROWBEGIN    IF new.type='2' THEN    insert into test_hisy(name, type, create_time, operation)     values(old.name, old.type, old.create_time, 'update');    END IF;END;//

delete觸發器

表test刪除記錄前，將刪除的記錄錄入到表test_hisy中（AFTER DELETE：刪除後觸發， BEFORE DELETE：刪除前觸發）

DELIMITER //DROP TRIGGER IF EXISTS t_before_delete_test//CREATE TRIGGER t_before_delete_testBEFORE DELETE ON testFOR EACH ROWBEGIN    insert into test_hisy(name, type, create_time, operation)     values(old.name, old.type, old.create_time, 'delete');END;//

註：以上觸發器例子中出現的new為修改後的資料， old為修改前的資料