if object_id('[aaa]') is not null drop table [aaa]

go

create table [aaa]([地区] varchar(4),[内容] varchar(45))

insert [aaa]

select '中国','021sp.html|管材|4355;028sp.html|建筑材料|3209' union all

select '中国','023sp.html|材|4356;025sp.html|建|9209'

go

select  a.地区,

 内容=substring(a.内容,b.number,charindex(';',a.内容+';',b.number)-b.number)

from [aaa] a

join master..spt_values b on b.type='P'

where charindex(';',';'+a.内容,b.number)=b.number

--合并分拆表

--> --> (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(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 Tab

go

SQL2005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('

{for $i in /Tab[position()

{concat("",string(/Tab[last()]/@COl2))}

')

)b

SQL05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:

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)=','

SQL2005用Xml:

select 

a.COl1,b.Col2

from 

(select Col1,COl2=convert(xml,''+replace(COl2,',','')+'') 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: