DECLARE @TB TABLE([id] VARCHAR(1), [amount] DECIMAL(5,1))
INSERT @TB
SELECT 'A', 12 UNION ALL
SELECT 'B', 34.5 UNION ALL
SELECT 'C', 7.7 UNION ALL
SELECT 'D', 1 UNION ALL
SELECT 'E', 2;WITH CTE AS
(
SELECT *,PATH=CAST(id AS VARCHAR(MAX)),total=CAST([amount] AS DECIMAL(5,1)) FROM @TB
UNION ALL
SELECT A.*,PATH+A.id,CAST(total+A.[amount] AS DECIMAL(5,1)) FROM @TB AS A, CTE WHERE A.id>CTE.id
)
SELECT B.id
FROM CTE, @TB AS B
WHERE CHARINDEX(B.id,PATH)>0 AND total=46.5
/*
id
----
A
B
*/
INSERT @TB
SELECT 'A', 12 UNION ALL
SELECT 'B', 34.5 UNION ALL
SELECT 'C', 7.7 UNION ALL
SELECT 'D', 1 UNION ALL
SELECT 'E', 2;WITH CTE AS
(
SELECT *,PATH=CAST(id AS VARCHAR(MAX)),total=CAST([amount] AS DECIMAL(5,1)) FROM @TB
UNION ALL
SELECT A.*,PATH+A.id,CAST(total+A.[amount] AS DECIMAL(5,1)) FROM @TB AS A, CTE WHERE A.id>CTE.id
)
SELECT B.id
FROM CTE, @TB AS B
WHERE CHARINDEX(B.id,PATH)>0 AND total=46.5
/*
id
----
A
B
*/
/******************************************************************************************************************************************************
合并分拆表数据整理人:中国风(Roy)日期:2008.06.06
******************************************************************************************************************************************************/--> --> (Roy)生成測試數據
if not object_id('Tab') is null
drop table Tab
Go
Create table Tab([Col1] int,[Col2] nvarchar(1))
Insert Tab
select 1,N'a' union all
select 1,N'b' union all
select 1,N'c' union all
select 2,N'd' union all
select 2,N'e' union all
select 3,N'f'
Go合并表:SQL2000用函数:go
if object_id('F_Str') is not null
drop function F_Str
go
create function F_Str(@Col1 int)
returns nvarchar(100)
as
begin
declare @S nvarchar(100)
select @S=isnull(@S+',','')+Col2 from Tab where Col1=@Col1
return @S
end
go
Select distinct Col1,Col2=dbo.F_Str(Col1) from TabgoSQL2005用XML:方法1:select
a.Col1,Col2=stuff(b.Col2.value('/R[1]','nvarchar(max)'),1,1,'')
from
(select distinct COl1 from Tab) a
Cross apply
(select COl2=(select N','+Col2 from Tab where Col1=a.COl1 For XML PATH(''), ROOT('R'), TYPE))b方法2:select
a.Col1,COl2=replace(b.Col2.value('/Tab[1]','nvarchar(max)'),char(44)+char(32),char(44))
from
(select distinct COl1 from Tab) a
cross apply
(select Col2=(select COl2 from Tab where COl1=a.COl1 FOR XML AUTO, TYPE)
.query('<Tab>
{for $i in /Tab[position()<last()]/@COl2 return concat(string($i),",")}
{concat("",string(/Tab[last()]/@COl2))}
</Tab>')
)bSQL05用CTE:;with roy as(select Col1,Col2,row=row_number()over(partition by COl1 order by COl1) from Tab)
,Roy2 as
(select COl1,cast(COl2 as nvarchar(100))COl2,row from Roy where row=1
union all
select a.Col1,cast(b.COl2+','+a.COl2 as nvarchar(100)),a.row from Roy a join Roy2 b on a.COl1=b.COl1 and a.row=b.row+1)
select Col1,Col2 from Roy2 a where row=(select max(row) from roy where Col1=a.COl1) order by Col1 option (MAXRECURSION 0)
生成结果:
/*
Col1 COl2
----------- ------------
1 a,b,c
2 d,e
3 f(3 行受影响)
*/
INSERT @TB
SELECT 'A', 12 UNION ALL
SELECT 'B', 34.5 UNION ALL
SELECT 'C', 7.7 UNION ALL
SELECT 'D', 1 UNION ALL
SELECT 'E', 2;WITH CTE AS
(
SELECT *,PATH=CAST(id AS VARCHAR(MAX)),total=CAST([amount] AS DECIMAL(5,1)) FROM @TB
UNION ALL
SELECT A.*,PATH+'+'+A.id,CAST(total+A.[amount] AS DECIMAL(5,1)) FROM @TB AS A, CTE WHERE A.id>CTE.id
)
SELECT DISTINCT PATH,total
FROM CTE, @TB AS B
WHERE CHARINDEX(B.id,PATH)>0 AND total in (46.5,54.2,2)
/*
A+B 46.5
A+B+C 54.2
E 2.0
*/
;WITH CTE AS
(
SELECT *,PATH=CAST(id AS VARCHAR(MAX)),total=CAST([amount] AS DECIMAL(5,1)) FROM @TB
UNION ALL
SELECT A.*,PATH+'+'+A.id,CAST(total+A.[amount] AS DECIMAL(5,1)) FROM @TB AS A, CTE WHERE A.id>CTE.id
)
SELECT PATH,total
FROM CTE
WHERE total in (46.5,54.2,2)