+" (select cover from res_work_management_img b where imgtype ='2' and b.workWorkId = (select id from res_work_management_work a where a.workId = be.id and imgsort = 1 ) LIMIT 1) cover "
+" from res_work_management be LEFT JOIN res_work_management_diy_type bdt ON be.id = bdt.workId "
" a.serieschinesename, cover from res_work_management a join res_work_management_work b on a.id =b.workid join res_work_management_diy_type d ON a.id = d.workId join res_work_management_img c on b.id=c.workWorkId where b.imgsort = 1 and c.imgtype ='2' and a.workStatus=1 "