SQL Server 2008 T-SQL UDF分割（）裁剪

Question

我正在使用SQL Ser 2008，并且只有一列数据的大表。数据是一个随机字符串，一致性很低。例如：名称帐户445566 0010020056893010445478008 AFD 369.我一直在使用一个用户提示的分支函数。它工作得很好，但函数将分割字符串分配到一列中。我需要一排单列。目前的结果是1col，其中包含值名称，帐户，445566，...，但我要查找的结果是col1名称，col2帐户，col3 445566，... 如果任何人都可以提供一些关于如何定制这个脚本或它的用法来获得所需的结果，这将非常感激。

CREATE FUNCTION [dbo].[Split] 
( 
@String varchar(max) 
,@Delimiter char 
) 
RETURNS @Results table 
( 
Ordinal int 
,StringValue varchar(max) 
) 
as 
begin 

set @String = isnull(@String,'') 
set @Delimiter = isnull(@Delimiter,'') 

declare 
@TempString varchar(max) = @String 
,@Ordinal int = 0 
,@CharIndex int = 0 

set @CharIndex = charindex(@Delimiter, @TempString) 
while @CharIndex != 0 begin  
    set @Ordinal += 1   
    insert @Results values 
    ( 
    @Ordinal 
    ,substring(@TempString, 0, @CharIndex) 
    )   
    set @TempString = substring(@TempString, @CharIndex + 1, len(@TempString) - @CharIndex)  
    set @CharIndex = charindex(@Delimiter, @TempString) 
end 

if @TempString != '' begin 
    set @Ordinal += 1 
    insert @Results values 
    ( 
    @Ordinal 
    ,@TempString 
    ) 
end 

return 
end 

--The usage: 
SELECT  
* 
FROM  
mytable M  
CROSS APPLY  
[dbo].[Split] (M.TheColumn, ' ') S 
Where rtrim(s.StringValue) != '' 

Answer 1

如果你知道你在字符串中6列，你可以使用拆分功能，看起来像这样，当然还有修改功能所需的列的任何数字。函数不能返回动态数量的列。

create function dbo.Split6(@String varchar(max), @Delimiter char(1)) 
returns table as return 
(
    select 
    substring(T.Col, 1, S1.Pos-1) as Col1, 
    substring(T.Col, S1.Pos+1, S2.Pos-S1.Pos-1) as Col2, 
    substring(T.Col, S2.Pos+1, S3.Pos-S2.Pos-1) as Col3, 
    substring(T.Col, S3.Pos+1, S4.Pos-S3.Pos-1) as Col4, 
    substring(T.Col, S4.Pos+1, S5.Pos-S4.Pos-1) as Col5, 
    substring(T.Col, S5.Pos+1, S6.Pos-S5.Pos-1) as Col6 
    from (select @String+replicate(@Delimiter, 6)) as T(Col) 
    cross apply (select charindex(@Delimiter, T.Col, 1)) as S1(Pos) 
    cross apply (select charindex(@Delimiter, T.Col, S1.Pos+1)) as S2(Pos) 
    cross apply (select charindex(@Delimiter, T.Col, S2.Pos+1)) as S3(Pos) 
    cross apply (select charindex(@Delimiter, T.Col, S3.Pos+1)) as S4(Pos) 
    cross apply (select charindex(@Delimiter, T.Col, S4.Pos+1)) as S5(Pos) 
    cross apply (select charindex(@Delimiter, T.Col, S5.Pos+1)) as S6(Pos) 
) 

测试：

declare @T table (Col varchar(100)) 

insert into @T values 
('Name Account 445566 0010020056893010445478008 AFD 369'), 
(''), 
('1 2'), 
('1 3') 

select S.Col1, S.Col2, S.Col3, S.Col4, S.Col5, S.Col6 
from @T as T 
    cross apply 
    dbo.Split6(T.Col, ' ') as S 

结果：

Col1 Col2  Col3 Col4      Col5 Col6 
---- ------- ------ ------------------------- ---- ---- 
Name Account 445566 0010020056893010445478008 AFD 369 

1  2    
1    3    

Answer 2

您可以尝试使用PIVOT。

http://msdn.microsoft.com/en-us/library/ms177410.aspx