使用sql server的笛卡爾積

Question

對於笛卡爾積，使用SQL Server 2012確實存在問題。

這裏是我的示例查詢：

SELECT A1.* 
    ,RIGHT('00000' + A1.SampleID,5) AS [RealSampleID] 

FROM 
(
SELECT 
    ARS1.SampleID 
    ,ARS1.SampleNo 
FROM TblSamples AS ARS1 
GROUP BY 
    ARS1.SampleNo 
    ,ARS1.SampleID 
) AS [A1] 
INNER JOIN 
(
SELECT 
    ARS2.SampleID 
    ,ARS2.SampleNo 
FROM TblSamples AS ARS2 
WHERE ISNUMERIC(ARS2.SampleID) = 0 
GROUP BY 
    ARS2.SampleNo 
    ,ARS2.SampleID 
) AS A2 
ON A1.SampleNo=A2.SampleNo 

我查詢的結果

預期結果：

Cartesian product Formula： 非數字SampleID X數字SampleID每SampleNo

實施例：

所有SampleNo 。我們在SampleID列和一個不同的非數字值（R00137）中有兩個數值（277和278）。然後這個非數字值（R00137）的RealSampleID將是00277和00278.就像我們在上面的圖像輸出中看到的一樣。

Answer 1

沒有樣本數據，這可能不是你想要的，但是這是笛卡爾乘積：

SELECT A1.* 
    ,RIGHT('00000' + A1.SampleID,5) AS [RealSampleID] 
FROM 
(
SELECT 
    ARS1.SampleID 
    ,ARS1.SampleNo 
FROM TblSamples AS ARS1 
GROUP BY 
    ARS1.SampleNo 
    ,ARS1.SampleID 
) AS [A1], 
(
SELECT 
    ARS2.SampleID 
    ,ARS2.SampleNo 
FROM TblSamples AS ARS2 
WHERE ISNUMERIC(ARS2.SampleID) = 0 
GROUP BY 
    ARS2.SampleNo 
    ,ARS2.SampleID 
) AS A2