环境:SQL SERVER2000
原始表:CREATE TABLE [kqday] (
[gh] [int] NOT NULL ,
[rq] [char] (2) NOT NULL ,
[sour] [varchar] (60) NOT NULL ,
PRIMARY KEY CLUSTERED
(
[gh],
[rq]
) ON [PRIMARY]
) ON [PRIMARY]
GO
原始表数据:
gh rq sour
4 11 07:53
4 12 07:53,12:04,13:23
4 17 07:58,12:04
5 01 07:53,12:04,13:23,17:35
......目的表:CREATE TABLE [kqtime] (
[gh] [char] (15) NOT NULL ,
[rq] [char] (2) NOT NULL ,
[sktime] [char] NOT NULL
) ON [PRIMARY]
GO
需要的数据:
gh rq sktime
4 11 07:53
4 12 07:53
4 12 12:04
4 12 13:23
4 17 07:58
4 17 12:04
5 01 07:53
5 01 12:04
5 01 13:23
5 01 17:35
原始表:CREATE TABLE [kqday] (
[gh] [int] NOT NULL ,
[rq] [char] (2) NOT NULL ,
[sour] [varchar] (60) NOT NULL ,
PRIMARY KEY CLUSTERED
(
[gh],
[rq]
) ON [PRIMARY]
) ON [PRIMARY]
GO
原始表数据:
gh rq sour
4 11 07:53
4 12 07:53,12:04,13:23
4 17 07:58,12:04
5 01 07:53,12:04,13:23,17:35
......目的表:CREATE TABLE [kqtime] (
[gh] [char] (15) NOT NULL ,
[rq] [char] (2) NOT NULL ,
[sktime] [char] NOT NULL
) ON [PRIMARY]
GO
需要的数据:
gh rq sktime
4 11 07:53
4 12 07:53
4 12 12:04
4 12 13:23
4 17 07:58
4 17 12:04
5 01 07:53
5 01 12:04
5 01 13:23
5 01 17:35
[code=SQL]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
*/
[/code]
if object_id('[kqday]') is not null drop table [kqday]
create table [kqday]([gh] int,[rq] varchar(2),[sour] varchar(23))
insert [kqday]
select 4,'11','07:53' union all
select 4,'12','07:53,12:04,13:23' union all
select 4,'17','07:58,12:04' union all
select 5,'01','07:53,12:04,13:23,17:35'
--> 测试数据:[kqtime]
if object_id('[kqtime]') is not null drop table [kqtime]
CREATE TABLE [kqtime] (
[gh] [char] (15) NOT NULL ,
[rq] [char] (2) NOT NULL ,
[sktime] [char](20) NOT NULL
) ON [PRIMARY]
GO
insert into kqtime
select
[gh],
[rq],
[sour]=substring(r.[sour],t.number,charindex(',',r.[sour]+',',t.number)-t.number)
from [kqday] r,master..spt_values t
where t.type='p'
and substring(','+r.[sour],t.number,1)=','select * from kqtime
----------------------------
4 11 07:53
4 12 07:53
4 12 12:04
4 12 13:23
4 17 07:58
4 17 12:04
5 01 07:53
5 01 12:04
5 01 13:23
5 01 17:35
create table [tb]([gh] int,[rq] varchar(2),[sour] varchar(23))
insert [tb]
select 4,'11','07:53' union all
select 4,'12','07:53,12:04,13:23' union all
select 4,'17','07:58,12:04' union all
select 5,'01','07:53,12:04,13:23,17:35'
goSELECT TOP 8000 id = IDENTITY(int, 1, 1) INTO # FROM syscolumns a, syscolumns b SELECT A.gh , a.rq, sour = SUBSTRING(A.[sour], B.id, CHARINDEX(',', A.[sour] + ',', B.id) - B.id)
FROM tb A, # B
WHERE SUBSTRING(',' + A.[sour], B.id, 1) = ','
order by A.gh , a.rqDROP TABLE #
drop table tb/*
gh rq sour
----------- ---- -----------------------
4 11 07:53
4 12 07:53
4 12 12:04
4 12 13:23
4 17 07:58
4 17 12:04
5 01 07:53
5 01 12:04
5 01 13:23
5 01 17:35(所影响的行数为 10 行)*/
--其他方法见下:
/*
标题:分拆列值1
作者:爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开)
时间:2008-11-20
地点:广东深圳
描述有表tb, 如下:
id value
----------- -----------
1 aa,bb
2 aaa,bbb,ccc
欲按id,分拆value列, 分拆后结果如下:
id value
----------- --------
1 aa
1 bb
2 aaa
2 bbb
2 ccc
*/--1. 旧的解决方法(sql server 2000)
SELECT TOP 8000 id = IDENTITY(int, 1, 1) INTO # FROM syscolumns a, syscolumns b SELECT A.id, value = SUBSTRING(A.[value], B.id, CHARINDEX(',', A.[value] + ',', B.id) - B.id)
FROM tb A, # B
WHERE SUBSTRING(',' + A.[value], B.id, 1) = ','DROP TABLE #--2. 新的解决方法(sql server 2005)
create table tb(id int,value varchar(30))
insert into tb values(1,'aa,bb')
insert into tb values(2,'aaa,bbb,ccc')
go
SELECT A.id, B.value
FROM(
SELECT id, [value] = CONVERT(xml,'<root><v>' + REPLACE([value], ',', '</v><v>') + '</v></root>') FROM tb
)A
OUTER APPLY(
SELECT value = N.v.value('.', 'varchar(100)') FROM A.[value].nodes('/root/v') N(v)
)BDROP TABLE tb/*
id value
----------- ------------------------------
1 aa
1 bb
2 aaa
2 bbb
2 ccc(5 行受影响)
*/