MySQL触发器

test_log脚本
CREATE TABLE test_log(
   id INT PRIMARY KEY AUTO_INCREMENT,
   content varchar(200)
);

--创建触发器(增加)
CREATE TRIGGER tri_empAdd AFTER INSET ON employee FOR EACH ROW --当向员工表插入一条数据时
INSERT INTO test_log (content) values(‘员工表插入了一条记录‘);

--整个触发器的意思是：当我向员工表人插入一条数据时，日志表也插入一条数据。


--创建触发器(修改)
CREATE TRIGGER tri_empAdd AFTER UPDATE ON employee FOR EACH ROW
INSERT INTO test_log (content) values(‘员工表修改了一条记录‘);

UPDATE employee SET empName=‘‘eric" WHERE eid=7;

--创建触发器(删除)
CREATE TRIGGER tri_empAdd AFTER DELETE ON employee FOR EACH ROW
INSERT INTO test_log (content) values(‘员工表修改了一条记录‘);

DELETE FROM employee WHERE eid = 7;