我有两列具有多个值，我需要解析

Question

我有一张这样的表：

Make       Model                    Year
----------------------------------------------------    
Toyota     Corolla, Camry, Avalon   2009, 2006, 2011

我希望它如下：

Make       Model      Year
------------------------------    
Toyota     Corolla    2009
Toyota     Camry      2006
Toyota     Avalon     2011

基本上我希望将两列分开并按列出的顺序相互关联。

Answer 1

返回序列的解析函数可以帮助

示例

Select A.Make
      ,B.*
 From  YourTable A
 Cross Apply (
                Select Model=B1.RetVal
                      ,Year =B2.RetVal
                 From  [dbo].[tvf-Str-Parse](A.Model,',') B1
                 Join  [dbo].[tvf-Str-Parse](A.Year,',')  B2
                   on  B1.RetSeq=B2.RetSeq
             ) B

<强>返回

Make    Model   Year
Toyota  Corolla 2009
Toyota  Camry   2006
Toyota  Avalon  2011

感兴趣的UDF

CREATE FUNCTION [dbo].[tvf-Str-Parse] (@String varchar(max),@Delimiter varchar(10))
Returns Table 
As
Return (  
    Select RetSeq = Row_Number() over (Order By (Select null))
          ,RetVal = LTrim(RTrim(B.i.value('(./text())[1]', 'varchar(max)')))
    From  (Select x = Cast('<x>' + replace((Select replace(@String,@Delimiter,'§§Split§§') as [*] For XML Path('')),'§§Split§§','</x><x>')+'</x>' as xml).query('.')) as A 
    Cross Apply x.nodes('x') AS B(i)
);