insert into web_update(update_info, update_time) values (#{updateInfo}, #{updateTime}) SELECT LAST_INSERT_ID() AS id update web_update set update_info=#{info} where update_id = #{id}; delete from web_update where update_id = #{id} select EXISTS(select * from web_update where update_id = #{id}) select * from web_update where update_id = #{id} select * from web_update select * from web_update order by update_id desc limit 1