1.修改数据的触发器

修改数据的触发器

create trigger tb_user_update_triggerafter update on tb_user for each row
begininsert int user_logs(id,operation,operate_time,operate_id,operate_params)VALUES(null,'update',now(),new.id,concat('更新之前的数据：id=',new.id,',name=',new.name,', phone=',new.phone,', email=',new.email,', profession=',new.profession' | 更新之后的数据：id=',new.id,',name=',new.name,', phone=',new.phone,', email=',new.email,', profession=',new.profession));
end;show triggers;

更新数据

update tb_user set age = 32 where id = 23;

思考下面这个触发器会触发几次？几条数据就触发几次。

update tb_user set age = 32 where id <= 5;

2.删除数据的触发器

create trigger tb_user_delete_triggerafter delete on tb_user for each row
begininsert int user_logs(id,operation,operate_time,operate_id,operate_params)VALUES(null,'delete',now(),old.id,concat('删除之前的数据：id=',new.id,',name=',new.name,', phone=',new.phone,', email=',new.email,', profession=',new.profession);
end;show triggers;

delete from tb_user where id = 5;