如何使用 SQL 查询查看带有 group by 子句的逗号分隔字符串中的列值？

Question

如何在以下 SQL 查询（在 SQL Server 2014 中）中获取带有逗号分隔字符串的 U_ProductType 列。它需要按 DocNum 分组，并且在转换为逗号分隔字符串时不需要 U_ProductType 中的 Null 值。我也尝试了“FOR XML PATH”选项。这是我的查询供您参考，

SELECT
    ORDR.DocNum, ORDR.CardCode, ORDR.CardName, ORDR.SlpCode,
    OSLP.SlpName, OITM.U_Product_Type,
    SUM (RDR1.LineTotal) LineTotal,
    ISNULL (SUM (DPI1.LineTotal), 0) dwpnt
FROM
    ORDR
INNER JOIN 
    RDR1 ON RDR1.DocEntry = ORDR.DocEntry   
LEFT JOIN 
    OITM ON OITM.ItemCode = RDR1.ItemCode
LEFT JOIN 
    OSLP ON OSLP.SlpCode = ORDR.SlpCode
LEFT JOIN 
    DPI1 ON DPI1.BaseEntry = RDR1.DocEntry 
         AND DPI1.TargetType <> 14 
         AND DPI1.BaseLine = RDR1.LineNum
LEFT JOIN 
    RCT2 ON RCT2.DocEntry = DPI1.DocEntry
LEFT JOIN  
    ORCT ON RCT2.DocNum = ORCT.DocEntry AND ORCT.Canceled = 'N'
WHERE 
    ORDR.CANCELED = 'N' 
    AND ISNULL (DPI1.LineTotal, 0) = 0 
    AND ORDR.SlpCode = 67
GROUP BY 
    ORDR.DocNum, ORDR.CardCode, ORDR.CardName, ORDR.SlpCode,
    OSLP.SlpName, OITM.U_Product_Type

结果和我的要求如下，

Answer 1

您可以使用 STUFF()，如下所示。只需将 cte 替换为您的原始查询即可。另一种方法是用您当前的结果创建一个临时文件 table，并将 cte 替换为新创建的临时文件 table。

SELECT DoNum
        , CardCode
        , CardName
        , SipCode
        , SlpName
        , STUFF((SELECT DISTINCT ',' + CONVERT(VARCHAR,U_Product_Type) 
         FROM [cte] t1
         WHERE (DoNum = cte.DoNum
         and CardCode = t1.CardCode
         and CardName = t1.CardName
         and SipCode = t1.SipCode
         and SlpName = t1.SlpName) 
         FOR XML PATH ('')), 1, 2, '') AS U_Product_Type
         ,sum(LineTotal) as LineTotal
         ,sum(dwpnt) as dwpnt
FROM cte
group by DoNum
, CardCode
, CardName
, SipCode
, SlpName

Live Demo

如何使用 SQL 查询查看带有 group by 子句的逗号分隔字符串中的列值？

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