测试表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;
测试表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 '操作类型',
PRIMARY KEY (ID)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
insert触发器
表test新增记录后，将type值为“1”的记录同时插入到test_hisy表中(AFTER INSERT：录入后触发，BEFORE INSERT：录入前触发)
DELIMITER //
DROP TRIGGER IF EXISTS t_after_insert_test//
CREATE TRIGGER t_after_insert_test
AFTER INSERT ON test
FOR EACH ROW
BEGIN
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触发器
表test修改时，若type值为“2”则将修改前的记录同时插入到test_hisy表中(AFTER UPDATE：修改后触发，BEFORE UPDATE：修改前触发)
DELIMITER //
DROP TRIGGER IF EXISTS t_before_update_test//
CREATE TRIGGER t_before_update_test
BEFORE UPDATE ON test
FOR EACH ROW
BEGIN
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触发器
表test删除记录前，将删除的记录录入到表test_hisy中(AFTER DELETE：删除后触发，BEFORE DELETE：删除前触发)
DELIMITER //
DROP TRIGGER IF EXISTS t_before_delete_test//
CREATE TRIGGER t_before_delete_test
BEFORE DELETE ON test
FOR EACH ROW
BEGIN
insert into test_hisy(name, type, create_time, operation)
values(old.name, old.type, old.create_time, 'delete');
END;//
注：
以上触发器例子中出现的new为修改后的数据， old为修改前的数据
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