orcale三表连接查询

SELECT w.ZDBH,
w.HEATINGANDAIRCONDITIONERID,
  w.ZDMC,
  w.CZBH,
  w.CZMC,
  w.CNXS,
  w.ND,
  w.KTJF,
  w.KTJFMJ,
  w.KTZY,
  w.KTCS,
  w.KTJ,
  h.hMJ HCOUNT,
  a.hmj KCOUNT
FROM TB_FDN_HEATINGAIRCONDITIONER w
LEFT JOIN (select HEATINGANDAIRCONDITIONERID,sum(MJ) hmj from TB_FDN_HEATINGHOUSE where TB_FDN_HEATINGHOUSE.HEATINGTYPE=0 group by HEATINGANDAIRCONDITIONERID) h ON (w.HEATINGANDAIRCONDITIONERID=h.HEATINGANDAIRCONDITIONERID)
LEFT JOIN (select HEATINGANDAIRCONDITIONERID,sum(MJ) hmj from TB_FDN_HEATINGHOUSE where TB_FDN_HEATINGHOUSE.HEATINGTYPE=1 group by HEATINGANDAIRCONDITIONERID) a ON (w.HEATINGANDAIRCONDITIONERID=a.HEATINGANDAIRCONDITIONERID)