求按日期分组后组内按条件输出的sql语句

select 时间,
       sum(数据) as [全国],
       sum(case when 省份='陕西' then 数据 else 0 end) [陕西],
       sum(case when 省份='山西' then 数据 else 0 end) [山西],
       sum(case when 省份='河南' then 数据 else 0 end) [河南]
from tb 
group by 时间
/*
时间	全国	陕西	山西	河南
2013-08-01 00:00:00.000	50	50	0	0
2013-08-02 00:00:00.000	50	50	0	0
2013-08-03 00:00:00.000	100	50	0	50
2013-08-04 00:00:00.000	50	50	0	0
2013-08-05 00:00:00.000	150	50	50	50
*/

----------------------------------------------------------------
-- Author  :DBA_Huangzj(發糞塗牆)
-- Date    :2014-01-22 14:07:39
-- Version:
--      Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (X64) 
--	Dec 28 2012 20:23:12 
--	Copyright (c) Microsoft Corporation
--	Enterprise Edition (64-bit) on Windows NT 6.2 <X64> (Build 9200: )
--
----------------------------------------------------------------
--> 测试数据：[huang]
if object_id('[huang]') is not null drop table [huang]
go 
create table [huang]([时间] date,[省份] varchar(4),[数据] int)
insert [huang]
select '2013-8-1','陕西',50 union all
select '2013-8-2','陕西',50 union all
select '2013-8-3','陕西',50 union all
select '2013-8-3','河南',50 union all
select '2013-8-4','陕西',50 union all
select '2013-8-5','陕西',50 union all
select '2013-8-5','河南',50 union all
select '2013-8-5','山西',50
--------------开始查询--------------------------
IF OBJECT_ID('tempdb..#t','U')IS NOT NULL 
DROP TABLE #t

SELECT * INTO #t
FROM (
SELECT *
FROM huang
UNION ALL 
SELECT [时间],'全国',SUM([数据])[数据]
FROM huang 
GROUP BY [时间])a

declare @s nvarchar(4000)
set @s=''
Select     @s=@s+','+quotename(省份)+'=max(case when [省份]='+quotename(省份,'''')+' then [数据] else 0 end)'
from #t group by 省份

exec('select [时间]'+@s+' from #t group by [时间] ')
----------------结果----------------------------
/* 
时间         河南          全国          山西          陕西
---------- ----------- ----------- ----------- -----------
2013-08-01 0           50          0           50
2013-08-02 0           50          0           50
2013-08-03 50          100         0           50
2013-08-04 0           50          0           50
2013-08-05 50          150         50          50
*/

create table tb(时间 datetime,省份 varchar(20),  数据 int)

insert into tb
select '2013-8-1',  '陕西',  50 union all
select '2013-8-2',  '陕西',  50 union all
select '2013-8-3',  '陕西',  50 union all
select '2013-8-3',  '河南',  50 union all
select '2013-8-4',  '陕西',  50 union all
select '2013-8-5',  '陕西',  50 union all
select '2013-8-5',  '河南',  50 union all
select '2013-8-5',  '山西',  50
go


declare @sql varchar(8000)

set @sql = ',sum(数据) as [全国]'

select @sql = @sql + ',sum(case when 省份='''+省份+''' then 数据 else 0 end) ['+省份+']'
from tb
group by 省份
order by 省份 desc

select @sql = 'select 时间'+@sql +
              'from tb group by 时间'

exec( @sql)
/*
时间	全国	陕西	山西	河南
2013-08-01 00:00:00.000	50	50	0	0
2013-08-02 00:00:00.000	50	50	0	0
2013-08-03 00:00:00.000	100	50	0	50
2013-08-04 00:00:00.000	50	50	0	0
2013-08-05 00:00:00.000	150	50	50	50
*/