SQL Serverの：ピボットを使用した動的SQL私は、このSQL Serverのクエリを持っている最大数に基づい

Question

上：

SELECT [VendorID], [QuotedAmount] 
FROM [tbl_Vendor_Quotation] 
WHERE [ProductID] = 1 
ORDER BY vendorID 

このクエリは、このようなデータを返します。

VendorID  QuotedAmount 
------------------------- 
    1   1000000 
    1    900000 
    1    750000 
    1    720000 
    1    650000 
    2   1250000 
    2   1200000 
    3   1500000 
    4   1000000 
    4    970000 
    4    950000 
    5   1450000 
    6   1450000 
    8   1200000 

私はこのようにし旋回するようにしたいですそれはR0、R1、以下の表のとおり

VendorId  R0  R1  R2  R3  R4 
---------------------------------------------------------- 
    1   1000000 900000 750000 720000 650000 
    2   1250000 1200000 
    3   1500000 
    4   1000000 970000 950000 
    5   1450000 
    6   1450000 
    8   1200000 

を考え出すだろうという方法--- Rnが最大回を表示しますQuotedAmountを繰り返します。この場合、ベンダーID 1と同じR0、R1〜R4（5回）が5回繰り返される最大時間です。

私はそれを作るために多くの例に従ったが、成功しなかった。私を助けてください。あなたはrow_numberウィンドウ関数で最初にそれらをランク付けする必要があり

Answer 1

動的SQL +ピボット：

DECLARE @cols nvarchar(max), 
     @sql nvarchar(max) 

SELECT @cols = (
    SELECT DISTINCT ',[R'+ CAST(ROW_NUMBER() OVER (PARTITION BY VendorID ORDER BY (SELECT NULL)) - 1 as nvarchar(10)) +']' 
    FROM tbl_Vendor_Quotation 
    FOR XML PATH('') 
    ) 

SELECT @sql = N' 
SELECT * 
FROM (
    SELECT VendorID, 
      QuotedAmount, 
      ''R''+ CAST(ROW_NUMBER() OVER (PARTITION BY VendorID ORDER BY (SELECT NULL)) - 1 as nvarchar(10)) as Cols 
    FROM tbl_Vendor_Quotation 
    WHERE [ProductID] = 1 
    ) as p 
PIVOT (
    MAX(QuotedAmount) FOR Cols IN ('+STUFF(@cols,1,1,'')+') 
) as pvt' 

EXEC sp_executesql @sql 

出力：

VendorID R0  R1  R2  R3  R4 
1   1000000 900000 750000 720000 650000 
2   1250000 1200000 NULL NULL NULL 
3   1500000 NULL NULL NULL NULL 
4   1000000 970000 950000 NULL NULL 
5   1450000 NULL NULL NULL NULL 
6   1450000 NULL NULL NULL NULL 
8   1200000 NULL NULL NULL NULL 

Rn数はで動的に成長しますベンダーの行番号が増える場合

Answer 2

：

select VendorId, [1] as R0,[2] as R1,[3] as R2,[4] as R3,[5] as R4 
    from (
     select VendorId, QuotedAmount, 
       ROW_NUMBER() over (partition By VendorId order by QuotedAmount desc) as rn 
     from tbl_Vendor_Quotation 
     WHERE [ProductID] = 1) t1 
    PIVOT 
    (
    max(QuotedAmount) 
    for rn in ([1],[2],[3],[4],[5])) As PivotTable 

Answer 3

ありがとうございます@vercelli

私はあなたの助けを借りて私の答えを得ました。

Declare @ProdID int 
set @ProdID=1 
DECLARE @columnName VARCHAR(1000) 
DECLARE @columnVal VARCHAR(1000) 
DECLARE @Query VARCHAR(1000) 

--Create dynamic column name 
SELECT @columnName =COALESCE(@columnName + ', ','')+'['+cast(rn as varchar(10))+'] AS [R'+cast(rn as varchar(10))+']', 
    @columnVal =COALESCE(@columnVal + ',','')+'['+cast(rn as varchar(10))+']' FROM   
(select distinct 
       ROW_NUMBER() over (partition By VendorId order by QuotedAmount desc) as rn 
     from tbl_Vendor_Quotation where [ProductRequestID]=@ProdID ) a 

    print @columnName print @columnVal 

    set @Query='select VendorId,'+@columnName+' 
    from (
     select VendorId, QuotedAmount, 
       ROW_NUMBER() over (partition By VendorId order by QuotedAmount desc) as rn 
     from tbl_Vendor_Quotation where [ProductRequestID]='+cast(@ProdID as varchar(10))+') t1 
    PIVOT 
    (
    max(QuotedAmount) 
    for rn in ('+@columnVal+')) As PivotTable' 
    exec (@Query)