sql=" select htmc,dqyf,dqyf1,dqyf2,dqyf3,dqyf4,dqyf5 from "+form_table+"_dt1 where mainid="+mainid;
sql=" select htmc,isnull(dqyf,0) dqyf,isnull(dqyf1,0) as dqyf1,isnull(dqyf2,0) as dqyf2,isnull(dqyf3,0) as dqyf3,isnull(dqyf4,0) as dqyf4,isnull(dqyf5,0) as dqyf5 from "+form_table+"_dt1 where mainid="+mainid;