求一sql

[echoxue]

DECLARE  @T TABLE
(
	Air NVARCHAR(30),
	NameT NVARCHAR(100)
)

INSERT INTO @T
select 'UA,NW,CX,TD','IAM1' 
UNION ALL
select 'UA,NW,LH,TD','IAM2'


select * from @T

根据Air拆分，想得到如下数据:


UA,IAM1
NW,IAM1
CX,IAM1
TD,IAM1
UA,IAM2
NW,IAM2
LH,IAM2
TD,IAM2

[SQL77]

拆分函数一大堆,参考ROY大哥博客,

如果是4个分段,考虑用PARSENAME函数

[让你望见影子的墙]

select parsename(Air,1),NameT from @t union all
select parsename(Air,2),NameT from @t union all
select parsename(Air,3),NameT from @t union all
select parsename(Air,4),NameT from @t

[--小F--]

--参考
拆分表:

--> --> (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(5))
Insert Tab
select 1,N'a,b,c' union all
select 2,N'd,e' union all
select 3,N'f'
Go

--SQL2000用辅助表:
if object_id('Tempdb..#Num') is not null
    drop table #Num
go
select top 100 ID=Identity(int,1,1) into #Num from syscolumns a,syscolumns b
Select 
    a.Col1,COl2=substring(a.Col2,b.ID,charindex(',',a.Col2+',',b.ID)-b.ID) 
from 
    Tab a,#Num b
where
    charindex(',',','+a.Col2,b.ID)=b.ID --也可用 substring(','+a.COl2,b.ID,1)=','
--2000不使用辅助表
Select
    a.Col1,COl2=substring(a.Col2,b.number,charindex(',',a.Col2+',',b.number)-b.number) 
from 
    Tab a join master..spt_values  b 
    ON B.type='p' AND B.number BETWEEN 1 AND LEN(A.col2)
where
     substring(','+a.COl2,b.number,1)=','


SQL2005用Xml:

select 
    a.COl1,b.Col2
from 
    (select Col1,COl2=convert(xml,'<root><v>'+replace(COl2,',','</v><v>')+'</v></root>') from Tab)a
outer apply
    (select Col2=C.v.value('.','nvarchar(100)') from a.COl2.nodes('/root/v')C(v))b




SQL05用CTE:

;with roy as 
(select Col1,COl2=cast(left(Col2,charindex(',',Col2+',')-1) as nvarchar(100)),Split=cast(stuff(COl2+',',1,charindex(',',Col2+','),'') as nvarchar(100)) from Tab
union all
select Col1,COl2=cast(left(Split,charindex(',',Split)-1) as nvarchar(100)),Split= cast(stuff(Split,1,charindex(',',Split),'') as nvarchar(100)) from Roy where split>''
)
select COl1,COl2 from roy order by COl1 option (MAXRECURSION 0)

生成结果:
/*
Col1        COl2
----------- -----
1           a
1           b
1           c
2           d
2           e
3           f
*/

[htl258_Tony]

DECLARE  @T TABLE
(
    Air NVARCHAR(30),
    NameT NVARCHAR(100)
)

INSERT INTO @T
select 'UA,NW,CX,TD','IAM1' 
UNION ALL
select 'UA,NW,LH,TD','IAM2'


select a.NameT, b.Air  
from   
(   
   select NameT, Air = convert(xml,'<v>' + replace(Air, ',', '</v><v>') + '</v>') from @t   
) a   
outer apply   
(   
   select Air = n.v.value('.', 'varchar(10)') from a.Air.nodes('/v') n(v)   
) b   
/*
NameT	Air
IAM1	UA
IAM1	NW
IAM1	CX
IAM1	TD
IAM2	UA
IAM2	NW
IAM2	LH
IAM2	TD
*/

[老黎]

DECLARE  @T TABLE
(
    Air NVARCHAR(30),
    NameT NVARCHAR(100)
)

INSERT INTO @T
select 'UA,NW,CX,TD','IAM1' 
UNION ALL
select 'UA,NW,LH,TD','IAM2'

select air = substring(air,b.number,charindex(',',air+',',charindex(',',a.air+',',b.number))-b.number)
       ,NameT
from @T a
     inner join master..spt_values b
on charindex(',',','+a.air,b.number) = b.number 
and type = 'P'

--结果
/*
air                            NameT
------------------------------ ----------------------------------------------------------------------------------------------------
UA                             IAM1
NW                             IAM1
CX                             IAM1
TD                             IAM1
UA                             IAM2
NW                             IAM2
LH                             IAM2
TD                             IAM2

(8 行受影响)
*/