最近碰到一需求,是酱紫的: 一个销售商品表, 每年每月每天都卖出N种不同种类的商品, 最后要统计每月每种商品的销售额. 或每年的, 在此我模拟创建了一个简单的表, 主要说明经验和大家一块分享, 若发现有问题, 欢迎随时指教.

如下:(此表过于简单, 主要用于说明交叉表)

按某一年的多月查询结果如下:

多年对比查询结果如下:

具体实现代码如下:

----------创建一个交叉表--------------create table salesRecord (

id int primary key identity(1,1) not null,

[date] datetime not null,

[goods] varchar(10) not null,

[money] decimal(10,2) default 0

)

----------向交叉表中插入记录--------------

insert into salesRecord values('2009-3-2','显示器',2300)

insert into salesRecord values('2009-1-3','键盘',30)

insert into salesRecord values('2009-3-2','机箱',200)

insert into salesRecord values('2009-7-2','鼠标',55)

insert into salesRecord values('2009-12-2','硬盘',455)

insert into salesRecord values('2009-9-2','屏保膜',10)

insert into salesRecord values('2009-4-28','硬盘',455)

insert into salesRecord values('2009-2-9','电源线',15)

insert into salesRecord values('2009-3-5','主板',605)

insert into salesRecord values('2009-8-15','摄像头',120)

insert into salesRecord values('2009-5-18','U盘',105)

insert into salesRecord values('2008-5-28','U盘',105)

insert into salesRecord values('2009-10-11','U盘',80)

-------创建访问交叉表的查询语句生成函数---(商品种类赿多,查出出的表字段就赿多)--------------

/*

* @year 某一年

* @ym 有可能是年 有可能是月, 看后边的@flag决定

* @month 某一月

* @flag 对前边参数的说明标记.

*   如果 YY 则某年到某年查询,前两个参数为开始年,结束年,第三个参数无效(但仍然需要传入任意整型值)

*   如果YMM 某一年从几月到几月查询 ,第一个参数为某年, 后两个参数为开始月和结束月.

* @returns 返回组装后的字符串.

*/create function getQueryStr (@y int,@ym int,@m int,@flag varchar(3))

returns varchar(7000)

as

begin

declare @tempStr varchar(20)

declare @rtnStr varchar(7000)

declare @condStr varchar(500)

--判断如果是YY则是查某一年到某一年,组装查询串及条件

if(@flag='YY')

begin

set @rtnStr=' select year(date)  as ''年份'', '

set @condStr=' year(date)>= '+cast(@y as varchar) +' and year(date)<= '+cast(@ym as varchar)+' group by year(date)'

end

else if(@flag='YYM')

--否则查某一年的某一月到某一月,组装查询串及条件 begin

set @rtnStr=' select cast(month(date) as varchar)+''月'' as ''月份'', '

set @condStr=' year(date)= '+cast(@y as varchar)+' and month(date)>= '+cast(@ym as varchar)+' and  month(date)<= '+cast(@m as varchar)+' group by month(date)'

end

declare getOne cursor

for

select distinct goods from salesRecord

open getOne

fetch next from getOne into @tempStr

while @@fetch_status=0

begin

set @rtnStr = @rtnStr+' sum(case goods when'''+@tempStr+'''then money else 0 end) as'''+@tempStr+''','

fetch next from getOne into @tempStr

end

close getOne

deallocate getOne

set @rtnStr=left(@rtnStr,len(@rtnStr)-1)

set @rtnStr=@rtnStr+' from salesRecord where'+@condStr

return @rtnStr

end

----------按多年查询------------

declare @str varchar(7000)

set @str=dbo.getQueryStr(2008,2009,0,'YY');

exec(@str)

----------按一年多月查询------------

declare @str varchar(7000)

set @str=dbo.getQueryStr(2009,0,12,'YYM');

exec(@str)

----------查询下源表中的数据对比下------------

select * from salesRecord order by date

---------如果不用了可以删除函数和表--------------

drop function getQueryStr

drop table salesRecord