등록자 홈페이지등록자 다른매물

에러쿼리보고 : /jiib_view.html?SCH_U_sido=%EC%B6%A9%EB%82%A8&SI_F_U_first=asc&article_num=668377&category_1=A
select * from TCBOARD_msg_recv where TCBOARD_msg_recv.is_view<>'N' and (TCBOARD_msg_recv.u_viewer like '%;;%') and u_viewer like '%%' and (open_date=0 or open_date='') order by U_first asc
Unknown column 'U_first' in 'order clause'