存储过程读取表中记录的列为传入参数

uctuustx1113 2006-03-19 02:25:50

表内容如下

mydate yf23 yf24 yf25 yf26
2006-3-16 12 89 123 126
2006-3-17 21 87 133 326
2006-3-18 45 32 12 234
2006-3-19 66 14 17 134

现在的存储过程如下:
CREATE PROCEDURE fhm(@area nvarchar(23) ) AS
begin
declare @varea sysname
set @varea='yf'+@area
select @varea from allmoney
end
GO

现在运行这个exec fhm 23
结果是
yf23
yf23
yf23
yf23
我想得到的结果是

12
21
45
66
请高手指点

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huailairen 2006-03-19

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alter PROCEDURE fhm(@area nvarchar(23) ) AS
begin
declare @varea sysname
declare @sql varcahr(300)

set @varea='yf'+@area
set @sql='select '+@varea+' from allmoney'
exec(@sql)
end

huailairen 2006-03-19

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CREATE PROCEDURE fhm(@area nvarchar(23) ) AS
begin
declare @varea sysname
set @varea='yf'+@area
select @varea from allmoney
end

改成
CREATE PROCEDURE fhm(@area nvarchar(23) ) AS
begin
declare @varea sysname
declare @sql varcahr(300)

set @varea='yf'+@area
set @sql='select '+@varea+' from allmoney'
exec(@sql)
end

uctuustx1113 2006-03-19