on duplicate key mysql插入更新

insert into `test` (`job_id`, `user_name`, `total_time`) values ('12345', 'zhangsan', '10') on duplicate key update `job_id` ='12345',`user_name` = 'zhangsan', `total_time`= '14';

　　会判断主键或唯一键，存在就更新，不存在就插入