执行SQL发生错误！错误：no such column: num，语句：SELECT a.*,b.name as sortname,b.filename as sortfilename,c.name as subsortname,c.filename as subfilename,d.type,d.name as modelname,d.urlname,e.*,f.gcode FROM ay_content a LEFT JOIN ay_content_sort b ON a.scode=b.scode LEFT JOIN ay_content_sort c ON a.subscode=c.scode LEFT JOIN ay_model d ON b.mcode=d.mcode LEFT JOIN ay_member_group f ON a.gid=f.id LEFT JOIN ay_content_ext e ON a.id=e.contentid WHERE(a.scode in ('21') OR a.subscode='21') AND(a.lcode='') AND(a.bcode='') AND(a.status=1 AND d.type=2 AND a.status_recycle=1 AND a.date<'2025-07-01 06:12:54') AND(a.id !=num=9) ORDER BY a.sorting ASC,a.date DESC,a.id DESC LIMIT 1000 OFFSET 0I'm sorry, we've searched all over the earth, but we still can't find the page you want