select id, cmt_id, class_id from rt_class_meeting_class insert into rt_class_meeting_class cmt_id, class_id, #{cmtId}, #{classId}, update rt_class_meeting_class cmt_id = #{cmtId}, class_id = #{classId}, where id = #{id} delete from rt_class_meeting_class where id = #{id} delete from rt_class_meeting_class where id in #{id}