问句SQL，很麻烦
SQL code:
select xz_staffname,xz_clientname,case
when XZ_OutStockDate >= '2006-12-26' and XZ_OutStockDate <= '2007-12-25' then 2007
when XZ_OutStockDate >= '2007-12-26' and XZ_OutStockDate <= '2008-12-25' then 2008
when XZ_OutStockDate >= '2008-12-26' and XZ_OutStockDate <= '2009-12-25' then 2009
when XZ_OutStockDate >= '2009-12-26' and XZ_OutStockDate <= '2010-12-25' then 2010
when XZ_OutStockDate >= '2010-12-26' and XZ_OutStockDate <= '2011-12-25' then 2011
end as myear,m1m=sum(case
when XZ_OutStockDate >='2008-12-26' and XZ_OutStockDate<='2009-1-25'
then moneys end) ,m2m=sum(case
when XZ_OutStockDate >= '2009-1-26' and XZ_OutStockDate<='2009-2-25'
then moneys end) ,m3m=sum(case
when XZ_OutStockDate >= '2009-2-26' and XZ_OutStockDate<='2009-3-25'
then moneys end) ,m4m=sum(case
when XZ_OutStockDate >= '2009-3-26' and XZ_OutStockDate<='2009-4-25'
then moneys end) ,m5m=sum(case
when XZ_OutStockDate >= '2009-4-26' and XZ_OutStockDate<='2009-5-25'
then moneys end) ,m6m=sum(case
when XZ_OutStockDate >= '2009-5-26' and XZ_OutStockDate<='2009-6-25'
then moneys end) ,m7m=sum(case
when XZ_OutStockDate >= '2009-6-26' and XZ_OutStockDate<='2009-7-25'
then moneys end) ,m8m=sum(case
when XZ_OutStockDate >= '2009-7-26' and XZ_OutStockDate<='2009-8-2
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