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SQL Serverで複数の行を複数の列に動的に結合する

Microsoft SQL Serverを使用して以下のアクションを動的に実行する必要がある大きなデータベーステーブルがあります。

このような結果から:

 badge   |   name   |   Job   |   KDA   |   Match 
 - - - - - - - - - - - - - - - -
 T996    |  Darrien |   AP    |   3.0   |   20
 T996    |  Darrien |   ADC   |   2.8   |   16
 T996    |  Darrien |   TOP   |   5.0   |   120

SQLを使用してこのような結果にするには:

badge   |   name   |  AP_KDA | AP_Match | ADC_KDA | ADC_Match | TOP_KDA | TOP_Match 
- - - - - - - - -
T996    |  Darrien |   3.0   |   20     |  2.8    |   16      |   5.0   |  120      

30行ある場合でも、60列の単一行に結合されます。

私は現在、ハードコーディング(下記の例を参照)でそれを行うことができますが、動的にはできません。

Select badge,name,
(
 SELECT max(KDA)
 FROM table
 WHERE (h.badge = badge) AND (h.name = name) 
 AND (Job = 'AP')
) AP_KDA,
(
 SELECT max(Match)
 FROM table
 WHERE (h.badge = badge) AND (h.name = name) 
 AND (Job = 'AP')
) AP_Match,
(
 SELECT max(KDA)
 FROM table
 WHERE (h.badge = badge) AND (h.name = name) 
 AND (Job = 'ADC')
) ADC_KDA,
(
 SELECT max(Match)
 FROM table
 WHERE (h.badge = badge) AND (h.name = name) 
 AND (Job = 'ADC')
) ADC_Match,
(
 SELECT max(KDA)
 FROM table
 WHERE (h.badge = badge) AND (h.name = name) 
 AND (Job = 'TOP')
) TOP_KDA,
(
 SELECT max(Match)
 FROM table
 WHERE (h.badge = badge) AND (h.name = name) 
 AND (Job = 'TOP')
) TOP_Match
from table h

複数の行を1つの行に結合できるMSSQLステートメントが必要です。列3(Job)のコンテンツは、列4および5のヘッダー(KDAおよびMatch)と結合され、新しい列になります。

したがって、Jobに6つの異なる値がある場合(たとえばJob1 使って Job6)、結果は12列になります。例:Job1_KDAJob1_MatchJob2_KDAJob2_Matchなど。バッジと名前でグループ化されています。

列3のデータをループできるステートメントが必要なので、ハードコード(可能なJob値ごとにクエリを繰り返す)または一時テーブルを使用する必要はありません。

15
chabu

私は動的SQLを使用してそれを行いますが、これは( http://sqlfiddle.com/#!6/a63a6/1/ )PIVOTソリューションです:

SELECT badge, name, [AP_KDa], [AP_Match], [ADC_KDA],[ADC_Match],[TOP_KDA],[TOP_Match] FROM
(
SELECT badge, name, col, val FROM(
 SELECT *, Job+'_KDA' as Col, KDA as Val FROM @T 
 UNION
 SELECT *, Job+'_Match' as Col,Match as Val  FROM @T
) t
) tt
PIVOT ( max(val) for Col in ([AP_KDa], [AP_Match], [ADC_KDA],[ADC_Match],[TOP_KDA],[TOP_Match]) ) AS pvt

ボーナス:PIVOTを動的SQLと組み合わせる方法( http://sqlfiddle.com/#!6/a63a6/7/ )しかし、これは私にとってちょうど良い運動です:

SELECT badge, name, cast(Job+'_KDA' as nvarchar(128)) as Col, KDA as Val INTO #Temp1 FROM Temp 
INSERT INTO #Temp1 SELECT badge, name, Job+'_Match' as Col, Match as Val FROM Temp

DECLARE @columns nvarchar(max)
SELECT @columns = COALESCE(@columns + ', ', '') + Col FROM #Temp1 GROUP BY Col

DECLARE @sql nvarchar(max) = 'SELECT badge, name, '+@columns+' FROM #Temp1 PIVOT ( max(val) for Col in ('+@columns+') ) AS pvt'
exec (@sql)

DROP TABLE #Temp1
10

1行に複数の行と列を組み合わせ、IDでグループ化

IF OBJECT_ID('usr_CUSTOMER') IS NOT NULL 
DROP TABLE usr_CUSTOMER

--------------------------CRATE TABLE---------------------------------------------------

GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[usr_CUSTOMER](
    [Last_Name] [nvarchar](50) NULL,
    [First_Name] [nvarchar](50) NULL,
    [Middle_Name] [nvarchar](50) NOT NULL,
    [ID] [int] NULL
) ON [PRIMARY]


GO
INSERT [dbo].[usr_CUSTOMER] ([Last_Name], [First_Name], [Middle_Name], [ID]) VALUES (N'gal', N'ornon', N'gili', 111)
GO
INSERT [dbo].[usr_CUSTOMER] ([Last_Name], [First_Name], [Middle_Name], [ID]) VALUES (N'porat', N'Yahel', N'LILl', 44444)
GO
INSERT [dbo].[usr_CUSTOMER] ([Last_Name], [First_Name], [Middle_Name], [ID]) VALUES (N'Shabtai', N'Or', N'Orya', 2222)
GO
INSERT [dbo].[usr_CUSTOMER] ([Last_Name], [First_Name], [Middle_Name], [ID]) VALUES (N'alex', N'levi', N'dolev', 33)
GO
INSERT [dbo].[usr_CUSTOMER] ([Last_Name], [First_Name], [Middle_Name], [ID]) VALUES (N'oren', N'cohen', N'ornini', 44444)
GO
INSERT [dbo].[usr_CUSTOMER] ([Last_Name], [First_Name], [Middle_Name], [ID]) VALUES (N'ron', N'ziyon', N'amir', 2222)
GO



----------------------------script---------------------------------------------

IF OBJECT_ID('tempdb..#TempString') IS NOT NULL 
DROP TABLE #TempString

IF OBJECT_ID('tempdb..#tempcount') IS NOT NULL 
DROP TABLE #tempcount

IF OBJECT_ID('tempdb..#tempcmbnition') IS NOT NULL 
        DROP TABLE #tempcmbnition
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

SELECT  ID,
    [Last_Name] + '#' + [First_Name] + '#' + ISNULL([Middle_Name], '')  as StringRow 
    INTO #TempString  
FROM [dbo].[usr_CUSTOMER]  
ORDER BY StringRow


select distinct id 
into #tempcount
from usr_CUSTOMER


CREATE TABLE [dbo].[#tempcmbnition](
        [ID] [int] NULL,
        [combinedString] [nvarchar](max) NULL
) 

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

DECLARE @tableID table(ID int)  
insert into @tableID(ID) (select distinct Id from #tempcount)

DECLARE @CNT int
SET @CNT = (select count(*) from @tableID)


declare @lastRow int
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


WHILE (@CNT  >=1 )
    BEGIN       

        SET @lastRow = (SELECT TOP 1 id FROM #tempcount ORDER BY id DESC)
        DECLARE @combinedString VARCHAR(MAX) 
        set @combinedString = ''
        SELECT  @combinedString = COALESCE(@combinedString + '^ ', '') + StringRow
        from #TempString
        where ID = @lastRow
        insert into #tempcmbnition (ID, [combinedString]) values(@lastRow ,@combinedString)
        SET @CNT = @CNT-1
        DELETE #tempcount where ID = @lastRow
    END
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- if you what remove first char
--  UPDATE #tempcmbnition 
--  SET combinedString = RIGHT(combinedString, LEN(combinedString) - 1)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

select *from #TempString
select * from #tempcmbnition
1
galgil