id, community_id, type, title, view_num, join_all_count, join_count, img_type, img_url, status, publish_time, is_repeat, remark, json_object, adver_position_top, adver_position_application, create_at, create_by, update_at, update_by, end_time, is_del
delete from com_act_reserve_sub where reserve_id = #{reserveId};
delete from com_act_reserve_sub_selection where reserve_id = #{reserveId};
update com_act_reserve set join_count = join_count - 1 where id = #{reserveId}