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Select * from dbo.[Func_SplitStr]('a=1;b=2;c=3;d=4',';')
DiagItem DiagValue
a 1
b 2
c 3
d 4
ID Name Value
1 aaa a=1;b=2;c=3;d=4
ID Name Item Value
1 aaa a 1
1 aaa b 2
1 aaa c 3
1 aaa d 4
SP
if 某个条件
Begin
select * into #Temp from TAB
这个#Temp里面的是需要处理的数据。
End
if 另一个条件
Begin
select * into #Temp from TAB
这个#Temp里面的是需要处理的数据。
End
ID Name Value
1 aaa a=1;b=2;c=3;d=4
2 bbb aa=1;bbc=2;abcdc=5
--假如格式固定
CREATE TABLE #
(ID INT, Name VARCHAR(10), Value VARCHAR(1000))
INSERT INTO #
SELECT 1, 'aaa', 'a=1;b=2;c=3;d=4'
SELECT TOP 100 ID=IDENTITY(INT,1,1)INTO #1 FROM sysobjects
SELECT A.ID,A.Name,left(substring(A.Value,B.id,charindex(';',A.Value+';',B.id)-B.id),1)as Item,
right(substring(A.Value,B.id,charindex(';',A.Value+';',B.id)-B.id),1)as Value
FROM # A,#1 B
WHERE substring(';'+A.value,B.id,1)=';'
/*
ID Name Item Value
----------- ---------- ---- -----
1 aaa a 1
1 aaa b 2
1 aaa c 3
1 aaa d 4
(所影响的行数为 4 行)
*/
create table tb(ID int, Name varchar(10), Value varchar(50))
insert into tb values(1 , 'aaa' , 'a=1;b=2;c=3;d=4')
go
select id , name ,
item = left(parsename(replace(value , ';' , '.'),4),charindex('=',parsename(replace(value , ';' , '.'),4)) - 1) ,
value = substring(parsename(replace(value , ';' , '.'),4),charindex('=',parsename(replace(value , ';' , '.'),4)) + 1 ,len(parsename(replace(value , ';' , '.'),4)))
from tb
union all
select id , name ,
item = left(parsename(replace(value , ';' , '.'),3),charindex('=',parsename(replace(value , ';' , '.'),3)) - 1) ,
value = substring(parsename(replace(value , ';' , '.'),3),charindex('=',parsename(replace(value , ';' , '.'),3)) + 1 ,len(parsename(replace(value , ';' , '.'),3)))
from tb
union all
select id , name ,
item = left(parsename(replace(value , ';' , '.'),2),charindex('=',parsename(replace(value , ';' , '.'),2)) - 1) ,
value = substring(parsename(replace(value , ';' , '.'),2),charindex('=',parsename(replace(value , ';' , '.'),2)) + 1 ,len(parsename(replace(value , ';' , '.'),2)))
from tb
union all
select id , name ,
item = left(parsename(replace(value , ';' , '.'),1),charindex('=',parsename(replace(value , ';' , '.'),1)) - 1) ,
value = substring(parsename(replace(value , ';' , '.'),1),charindex('=',parsename(replace(value , ';' , '.'),1)) + 1 ,len(parsename(replace(value , ';' , '.'),1)))
from tb
drop table tb
/*
id name item value
----------- ---------- -------------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------
1 aaa a 1
1 aaa b 2
1 aaa c 3
1 aaa d 4
(所影响的行数为 4 行)
*/
---------------------------------
-- Author: liangCK 小梁
---------------------------------
--> 生成测试数据: @T
DECLARE @T TABLE (ID INT,Name VARCHAR(3),Value VARCHAR(15))
INSERT INTO @T
SELECT 1,'aaa','a=1;b=2;c=3;d=4'
--SQL查询如下:
DECLARE @spliter CHAR(1);
SET @spliter=';';
;WITH Liang AS
(
SELECT
A.ID,A.Name,
B.x.value('.','varchar(50)') AS Value
FROM (
SELECT
ID,Name,
CONVERT(XML,'<v>'+REPLACE(Value,@spliter,'</v><v>')+'</v>') AS Value
FROM @T
) AS A
CROSS APPLY A.Value.nodes('//v') AS B(x)
)
SELECT
ID,
Name,
Item=LEFT(Value,CHARINDEX('=',Value)-1),
Value=RIGHT(Value,CHARINDEX('=',REVERSE(Value))-1)
FROM Liang
/*
ID Name Item Value
----------- ---- -------------------------------------------------- --------------------------------------------------
1 aaa a 1
1 aaa b 2
1 aaa c 3
1 aaa d 4
(4 行受影响)
*/
--合并分拆表
/******************************************************************************************************************************************************
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 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('<Tab>
{for $i in /Tab[position()<last()]/@COl2 return concat(string($i),",")}
{concat("",string(/Tab[last()]/@COl2))}
</Tab>')
)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:
/*
Col1 COl2
----------- ------------
1 a,b,c
2 d,e
3 f
(3 行受影响)
*/
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,'<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
*/