执行SQL发生错误！错误：database is locked，语句：SELECT a.id,a.title,a.filename,a.ico,a.scode,b.filename as sortfilename,c.type,c.urlname FROM ay_content a LEFT JOIN ay_content_sort b ON a.scode=b.scode LEFT JOIN ay_model c ON b.mcode=c.mcode WHERE(a.id<730) AND a.scode='44' AND(a.acode='cn') AND(a.status=1) ORDER BY a.id DESC LIMIT 1