SQL查询问题求教？

select a.fyear,b.fname,
'1月'=case when fperiod=1 then sum(a.fendbal) else 0 end ,
'2月'=case when fperiod=2 then sum(a.fendbal) else 0 end ,
'3月'=case when fperiod=3 then sum(a.fendbal) else 0 end ,
'4月'=case when fperiod=4 then sum(a.fendbal) else 0 end ,
'5月'=case when fperiod=5 then sum(a.fendbal) else 0 end ,
'6月'=case when fperiod=6 then sum(a.fendbal) else 0 end ,
'7月'=case when fperiod=7 then sum(a.fendbal) else 0 end ,
'8月'=case when fperiod=8 then sum(a.fendbal) else 0 end ,
'9月'=case when fperiod=9 then sum(a.fendbal) else 0 end ,
'10月'=case when fperiod=10 then sum(a.fendbal) else 0 end ,
'11月'=case when fperiod=11 then sum(a.fendbal) else 0 end ,
'12月'=case when fperiod=12 then sum(a.fendbal) else 0 end
from openrowset('sqloledb','192.168.12.101';'sa';'',ais20080707094757.dbo.icinvbal) as a
inner join openrowset('sqloledb','192.168.12.101';'sa';'',ais20080707094757.dbo.t_stock) as b
on a.fstockid=b.fitemid
group by a.fyear,a.fperiod,b.fname
order by b.fname

--查询结果
年度      仓库    1月      二月    三月    四月    五月      六月      七月