sql-server - 区切られた文字列から複数の列を作成する方法

Question

それぞれが「-」で区切られた4つのコンポーネントを持つ在庫フィールドがあります。charindexデリミター間で見つかった値ごとに列を返すように、文字列を解析するために使用する方法がわかりません。例：フィールド値または文字列=item-color-size-shape。

私の目標は、アイテムを列、色を列、サイズを列、そして最終的に形にすることです。

Answer 1

最大4列の場合、次のように試すことができます：

declare @Table table (SomeColumn varchar(100));
insert into @Table
    select 'ball-blue-small-round'  union all
    select 'ball-red-small-round'   union all
    select 'ball-green-small-round' union all
    select 'ball---square'          union all
    select '----';

;with stage (s)
as  (   select  replace(SomeColumn, '-', '.')
        from    @Table
    )
select  [item] = parsename(s,4),
        [color] = parsename(s,3),
        [size] = parsename(s,2),
        [shape] = parsename(s,1)
from    stage;

4 を超える場合は、ご返信ください。より動的な解決策に取り組むことができます。

Answer 2

CROSS APPLY の使用 (理解のために長い名前を使用) -

declare @Table table (SomeColumn varchar(100));
insert into @Table
select 'ball-Orange-small-round'  union all
select 'bat-blue-medium-square'   union all
select 'stumps-green-large-rectangle'

SELECT * FROM @Table

SELECT Sub1.FirstSub1 AS Item
       ,Sub2.SecondSub1 AS Color
       ,Sub3.ThirdSub1 AS Size
       ,SubAfterThirdHyphen AS Shape 

FROM @Table 
CROSS APPLY (SELECT CHARINDEX('-',SomeColumn) AS FirstHyphenPos) AS Pos1
CROSS APPLY (SELECT SUBSTRING(SomeColumn,1,FirstHyphenPos-1) AS FirstSub1) AS Sub1
CROSS APPLY (SELECT SUBSTRING(SomeColumn,FirstHyphenPos+1,LEN(SomeColumn)) AS SubAfterFirstHyphen) AS Substr1

CROSS APPLY (SELECT CHARINDEX('-',Substr1.SubAfterFirstHyphen) AS SecondHyphenPos) AS Pos2
CROSS APPLY (SELECT SUBSTRING(Substr1.SubAfterFirstHyphen,1,SecondHyphenPos-1) AS SecondSub1) AS Sub2
CROSS APPLY (SELECT SUBSTRING(Substr1.SubAfterFirstHyphen,SecondHyphenPos+1,LEN(Substr1.SubAfterFirstHyphen)) AS SubAfterSecondHyphen) AS Substr2

CROSS APPLY (SELECT CHARINDEX('-',Substr2.SubAfterSecondHyphen) AS ThirdHyphenPos) AS Pos3
CROSS APPLY (SELECT SUBSTRING(Substr2.SubAfterSecondHyphen,1,ThirdHyphenPos-1) AS ThirdSub1) AS Sub3
CROSS APPLY (SELECT SUBSTRING(Substr2.SubAfterSecondHyphen,ThirdHyphenPos+1,LEN(Substr2.SubAfterSecondHyphen)) AS SubAfterThirdHyphen) AS Substr3