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' GoSQL2000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,'<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 */
CREATE TABLE CELL(基站名 nvarchar(30),BTSID int)insert CELL SELECT 'A-安庆-市区-天柱山', 3 union all SELECT 'B-安庆-潜山县-县城', 4 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 bSelect COL1=left(基站名,charindex(基站名,'-')+1),BTSID, COl2=substring(right(基站名,len(基站名)-charindex(基站名,'-')),b.ID,charindex('-',right(基站名,len(基站名)-charindex(基站名,'-'))+'-',b.ID)-b.ID) from CELL a,#Num b where charindex('-','-'+right(基站名,len(基站名)-charindex(基站名,'-')),b.ID)=b.ID --也可用 substring(','+a.COl2,b.ID,1)=','COL1 BTSID COl2 ------------------------------ ----------- ------------------------------ A 3 A A 3 安庆 A 3 市区 A 3 天柱山 B 4 B B 4 安庆 B 4 潜山县 B 4 县城(8 行受影响)
拆分表:
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'
GoSQL2000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,'<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
*/
SELECT 'A-安庆-市区-天柱山', 3 union all
SELECT 'B-安庆-潜山县-县城', 4
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 bSelect COL1=left(基站名,charindex(基站名,'-')+1),BTSID,
COl2=substring(right(基站名,len(基站名)-charindex(基站名,'-')),b.ID,charindex('-',right(基站名,len(基站名)-charindex(基站名,'-'))+'-',b.ID)-b.ID)
from
CELL a,#Num b
where
charindex('-','-'+right(基站名,len(基站名)-charindex(基站名,'-')),b.ID)=b.ID --也可用 substring(','+a.COl2,b.ID,1)=','COL1 BTSID COl2
------------------------------ ----------- ------------------------------
A 3 A
A 3 安庆
A 3 市区
A 3 天柱山
B 4 B
B 4 安庆
B 4 潜山县
B 4 县城(8 行受影响)