CREATE TABLE IF NOT EXISTS `app_device_user` ( `device_no` varchar(255) DEFAULT NULL, `user_id` char(36) DEFAULT NULL, KEY `device_no` (`device_no`), KEY `user_id` (`user_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; INSERT INTO app_device_user( device_no, user_id, gmt_create ) VALUES( #{deviceNo}, #{userId}, #{gmtCreate} ) DELETE FROM app_device_user WHERE device_no = #{deviceNo} AND user_id = #{userId}