求sql：数据表里的数字求和

[吃饱饱吖]

表里的数据为

a 1
b 2
c 3
d 4

想得到的数据为

a 1 1
b 2 3
c 3 6
d 4 10

即得到每一行与前面所有行的和

[發糞塗牆]

----------------------------------------------------------------
-- Author  :DBA_HuangZJ(發糞塗牆)
-- Date    :2014-09-22 16:42:28
-- Version:
--      Microsoft SQL Server 2012 - 11.0.5058.0 (X64) 
--	May 14 2014 18:34:29 
--	Copyright (c) Microsoft Corporation
--	Enterprise Edition: Core-based Licensing (64-bit) on Windows NT 6.3 <X64> (Build 9600: ) (Hypervisor)
--
----------------------------------------------------------------
--> 测试数据：[huang]
if object_id('[huang]') is not null drop table [huang]
go 
create table [huang]([col1] varchar(1),[col2] int)
insert [huang]
select 'a',1 union all
select 'b',2 union all
select 'c',3 union all
select 'd',4
--------------开始查询--------------------------

select * ,sum(col2)OVER(ORDER BY col1)col3
from [huang]
----------------结果----------------------------
/* 
col1 col2        col3
---- ----------- -----------
a    1           1
b    2           3
c    3           6
d    4           10
*/

[xiaodongni]

啥版本。12以上直接用分析函数。 sum(列2) over(order by 列1) 直接用分析函数就OK 了

[吃饱饱吖]

引用 2 楼 alimake 的回复:

啥版本。12以上直接用分析函数。 sum(列2) over(order by 列1) 直接用分析函数就OK 了

2008该怎么写呢？

[xiaodongni]

--不是这个12以上 就用这个吧
with cte as 
(select 'a' as name,1 as qty union all
select 'b' as name,2 as qty union all
select 'c' as name,3 as qty union all
select 'd' as name,4 as qty ),
cte1 as 
(select name,qty,ROW_NUMBER()over(order by name) as rn from cte)

select a.name,a.qty,sum(b.qty)as sums from cte1 as a join cte1 as b 
  on a.rn>=b.rn
  group by a.name,a.qty

--结果
name qty         sums
---- ----------- -----------
a    1           1
b    2           3
c    3           6
d    4           10

  

[發糞塗牆]

08也可以用我1楼的写法

[吃饱饱吖]

引用 5 楼 DBA_Huangzj 的回复:

08也可以用我1楼的写法

可是我运行的时候报错，说有语法错误，是不是08不支持这种语法？