select ‘ 普陀 ‘ , ‘2007-01’ , ‘1863896’ , ‘161.39’ , ‘11549.02’ union
select ‘ 普陀 ‘ , ‘2007-02’ , ‘1614015’ , ‘119.59’ , ‘13496.24’ union
select ‘ 普陀 ‘ , ‘2007-03’ , ‘1059235.19’ , ‘135.21’ , ‘7834’
— 测试语句
declare @key varchar ( 40)
declare @b bit
set @key= newid ()
select @b= dbo. xfn_initKey( @key)
select 区域 , TradeMonth, TradePrice, LastMonthPrice,
cast ( round (( Tradeprice- LastMonthPrice)* 100/ LastMonthPrice, 2) as varchar ( 10))+ ‘%’ as 环比 from (
select *, cast ( dbo. xfn_GetPrevMemberValue( @key, 区域 , Tradeprice) as float ) as LastMonthPrice from @t
) t
select @b= dbo. xfn_disposeKey( @key)
— 结果
/*
区域 TradeMonth TradePrice LastMonthPrice 环比
—- ———- ———————- ———————- ———–
闵行 2007-03 8796.67 NULL NULL
闵行 2007-04 9267.19 8796.67 5.35%
闵行 2007-05 9335.26 9267.19 0.73%
浦东 2007-01 8976.73 NULL NULL
浦东 2007-02 12568.05 8976.73 40.01%
浦东 2007-03 8023.98 12568 -36.16%
浦东 2007-04 18337.23 8023.98 128.53%
