日期:2014-05-18  浏览次数:20599 次

新手求助,关于SQL 2005中问题。万分感谢!!

问题是,根据GoodsId,GoodsName,进行一个分月加总 ,并行转列。下面是演示数据,小弟在此先谢过了。
GoodsId GoodsName Date Qty
1 a 2012/03/10 100
1 a 2012/03/17 100
1 a 2012/03/24 100
1 a 2012/03/31 100
2 b 2012/04/07 100
2 b 2012/04/14 100
2 b 2012/04/21 100
2 b 2012/04/28 100
1 a 2012/04/07 100
1 a 2012/04/14 100
1 a 2012/04/21 100
1 a 2012/04/28 100

result

GoodsId GoodsName 03/10 03/10 03/24 03/31 March_Sum 04/07 04/14 04/21 04/28 April_Sum
  1 a 100 100 100 100 400 100 100 100 100 400
  2 b 0 0 0 0 0 100 100 100 100 400

------解决方案--------------------
SQL code

--> 测试数据:[test]
go
if object_id('[test]') is not null 
drop table [test]
go
create table [test](
[GoodsId] int,
[GoodsName] varchar(1),
[Date] date,
[Qty] int
)
go
insert [test]
select 1,'a','2012/03/10',100 union all
select 1,'a','2012/03/17',100 union all
select 1,'a','2012/03/24',100 union all
select 1,'a','2012/03/31',100 union all
select 2,'b','2012/04/07',100 union all
select 2,'b','2012/04/14',100 union all
select 2,'b','2012/04/21',100 union all
select 2,'b','2012/04/28',100 union all
select 1,'a','2012/04/07',100 union all
select 1,'a','2012/04/14',100 union all
select 1,'a','2012/04/21',100 union all
select 1,'a','2012/04/28',100

declare @str varchar(max)
set @str=''
select @str=@str+','+quotename([Date],'')+'=max(case when [Date]='+QUOTENAME([Date],'''')+'
then [Qty] else 0 end)' from(select [GoodsId],[GoodsName],convert(varchar(5),[Date],101)[Date],
[Qty] from test
union all select [GoodsId],[GoodsName],'['+ltrim(DATEPART(MM,[Date]))+'月份]' as [Date],
SUM([Qty]) [Qty] from test group by [GoodsId],[GoodsName],'['+ltrim(DATEPART(MM,[Date]))+'月份]')a
group by [Date]
set @str='select [GoodsId],[GoodsName]'+@str+' from 
(select [GoodsId],[GoodsName],convert(varchar(5),[Date],101)[Date],
[Qty] from test
union all select [GoodsId],[GoodsName],''[''+ltrim(DATEPART(MM,[Date]))+''月份]'' as [Date],
SUM([Qty]) [Qty] from test group by [GoodsId],[GoodsName],''[''+ltrim(DATEPART(MM,[Date]))+''月份]'')a
 group by [GoodsId],[GoodsName]'
 exec(@str)
 /*
GoodsId    GoodsName    03/10    03/17    03/24    03/31    [3月份]    04/07    04/14    04/21    04/28    [4月份]
1    a    100    100    100    100    400    100    100    100    100    400
2    b    0    0    0    0    0    100    100    100    100    400
 */