`id`, `name`, `phone`, `position_type`, `created_at`
INSERT INTO `user` (`name`, `phone`, `position_type`)
VALUES (#{name}, #{phone}, #{positionType})
UPDATE `user`
SET `name` = #{name},
`phone` = #{phone},
`position_type` = #{positionType}
WHERE `id` = #{id}
DELETE FROM `user` WHERE `id` = #{id}