使用多个外部引用时出现外部引用错误

Question

所以我有一个运行良好的查询，但我需要在其他几个方面使用 Factory Std Cost，因此我没有多次调用该函数，而是将其放在外部应用中。但是它现在似乎不起作用。我收到以下错误：

Multiple columns are specified in an aggregated expression containing an outer reference. If an expression being aggregated contains an outer reference, then that outer reference must be the only column referenced in the expression.

这是工作查询：

SELECT
    DISTINCT ap.[SourcePartID] AS [Assembly Part ID],
    p.[PART_X] AS [Assembly Part #],
    p.[DESCR_X] AS [Assembly Part Description],
    oa2.[Part Count],
    oa2.[Total # of Parts],
    ([dbo].[fn_getFactoryStdCost](ap.[SourcePartID])) AS [Factory Std Cost],
    oa2.[# of Docs],
    oa2.[# of Software],
    'Logic Pending' AS [# of Std Cost Items],
    oa2.[# of HR Devices],
    oa2.[# of 3rd Party Devices],
    oa2.[# of Robots],
    oa2.[# of Buy Parts],
    oa2.[# of Make Parts]

  FROM AllPartsList ap
    LEFT JOIN visuser.EN_PART p
      ON p.[EN_Part_ID] = ap.[SourcePartID]
    OUTER APPLY (
        SELECT
            [Part Count]                = COUNT(    DISTINCT IIF( [Qty] = 0, null, [Component Part #])  ),  
            [Total # of Parts]          = SUM([Qty]),
            [# of Docs]                 = COUNT(    DISTINCT IIF( [Commodity Code] IN ('009', '072', '073', '075', '079', '082'), [Component Part #], null) ),  -- Commodity Codes: 009, 072, 073, 075, 079, 082  :  Commodity ID: 15, 84, 85, 87, 81, 92
            [# of Software]             = COUNT(    DISTINCT IIF( [Commodity Code] IN ('034'), [Component Part #], null)    ),                                  -- Commodity Code 034  :  Commodity ID: 28
            [# of HR Devices]           = COUNT(    DISTINCT IIF( [Commodity Code] IN ('002'), [Component Part #], null)    ),                                  -- Commodity Code 002  :  Commodity ID: 11
            [# of 3rd Party Devices]    = COUNT(    DISTINCT IIF( [Commodity Code] IN ('007'), [Component Part #], null)    ),                                  -- Commodity Code 007  :  Commodity ID: 5
            [# of Robots]               = COUNT(    DISTINCT IIF( ( [Commodity Code] IN ('005') /* AND [Make/Buy] = 'B' */ ), [Component Part #], null) )   ,       -- Commodity Code 005  :  Commodity ID: 13
            [# of Make Parts]           = COUNT(    DISTINCT IIF( [Make/Buy] = 'M', [Component Part #], null)   ),
            [# of Buy Parts]            = COUNT(    DISTINCT IIF( [Make/Buy] = 'B', [Component Part #], null)   ),
            [# of Ref Parts]            = COUNT(    DISTINCT IIF( [Make/Buy] = 'B', [Component Part #], null)   )
            
          FROM bomBreakdown
          WHERE
            [ComponentPartID] IS NOT NULL AND 
            [SourcePartID] = ap.[SourcePartID]
          GROUP BY [SourcePartID]
    ) oa2
    ORDER BY [PART_X]

这是我把它改成的。我将对该函数的调用移动到外部应用，并在主查询和第二个外部应用中使用它。该错误引用了第二个外部应用的第一行 oa1.[Factory Std Cost]

SELECT
    DISTINCT ap.[SourcePartID] AS [Assembly Part ID],
    p.[PART_X] AS [Assembly Part #],
    p.[DESCR_X] AS [Assembly Part Description],
    oa2.[Part Count],
    oa2.[Total # of Parts],
    oa1.[Factory Std Cost], 
    oa2.[# of Docs],
    oa2.[# of Software],
    'Logic Pending' AS [# of Std Cost Items],
    oa2.[# of HR Devices],
    oa2.[# of 3rd Party Devices],
    oa2.[# of Robots],
    oa2.[# of Buy Parts],
    oa2.[# of Make Parts]

  FROM AllPartsList ap
    LEFT JOIN visuser.EN_PART p
      ON p.[EN_Part_ID] = ap.[SourcePartID]
    OUTER APPLY (
      SELECT ([dbo].[fn_getFactoryStdCost](ap.[SourcePartID])) AS [Factory Std Cost]
    ) oa1
    OUTER APPLY (
        SELECT
            [Part Count]                = COUNT(    DISTINCT IIF( [Qty] = 0, null, [Component Part #])  ),  
            [Total # of Parts]          = SUM([Qty]),
            [# of Docs]                 = COUNT(    DISTINCT IIF( [Commodity Code] IN ('009', '072', '073', '075', '079', '082'), [Component Part #], null) ),  -- Commodity Codes: 009, 072, 073, 075, 079, 082  :  Commodity ID: 15, 84, 85, 87, 81, 92
            [# of Software]             = COUNT(    DISTINCT IIF( [Commodity Code] IN ('034'), [Component Part #], null)    ),                                  -- Commodity Code 034  :  Commodity ID: 28
            [# of HR Devices]           = COUNT(    DISTINCT IIF( ( [Commodity Code] IN ('002') AND oa1.[Factory Std Cost] > 0 ), [Component Part #], null) ),                                  -- Commodity Code 002  :  Commodity ID: 11
            [# of 3rd Party Devices]    = COUNT(    DISTINCT IIF( [Commodity Code] IN ('007'), [Component Part #], null)    ),                                  -- Commodity Code 007  :  Commodity ID: 5
            [# of Robots]               = COUNT(    DISTINCT IIF( ( [Commodity Code] IN ('005') /* AND [Make/Buy] = 'B' */ ), [Component Part #], null) )   ,       -- Commodity Code 005  :  Commodity ID: 13
            [# of Make Parts]           = COUNT(    DISTINCT IIF( ( [Make/Buy] = 'M' AND oa1.[Factory Std Cost] > 0 ), [Component Part #], null)    ),
            [# of Buy Parts]            = COUNT(    DISTINCT IIF( ( [Make/Buy] = 'B' AND oa1.[Factory Std Cost] > 0 ), [Component Part #], null)    ),
            [# of Ref Parts]            = COUNT(    DISTINCT IIF( ( [Make/Buy] = 'B' AND oa1.[Factory Std Cost] = 0 ), [Component Part #], null)    )
            
          FROM bomBreakdown
          WHERE
            [ComponentPartID] IS NOT NULL AND 
            [SourcePartID] = ap.[SourcePartID]
          GROUP BY [SourcePartID]
    ) oa2
    ORDER BY [PART_X]

AllPartsList 如下所示：

和 bomBreakdown：

我还原了查询，然后尝试一次添加一些内容以查看到底哪里出错了。我为 [# of Ref Parts] 添加了只有 Make/But = 'B' 的行（它基本上与购买零件相同）。在我为 stdCost 添加函数之前，它工作正常。然后我收到了相同的外部引用错误。这是一行：

COUNT(  DISTINCT IIF( ( [Make/Buy] = 'B' AND ([dbo].[fn_getFactoryStdCost](ap.[SourcePartID])) = 0 ), [Component Part #], null) )

经过一番尝试，我发现问题出在函数调用中的 ap.[SourcePartID] 处。这是 link AllPartsList 和 bomBreakdown table 的关键字段，所以我可以删除 ap. 并只使用 bomBreakdown table 中的那个，但它没有没有解决我首先试图解决的问题，即不多次调用该函数。

我正在使用：

SQL 服务器 2019 (v15.0.2070.41)
SSMS v18.5

Answer 1

您不能按照错误消息的提示在聚合中引用 OUTER 列。您可以自己尝试一个小例子，您会发现 MS SQL 不允许这样做。这是一个想法，其中外部引用通过 OUTER 子查询中的附加 JOIN 变成内部引用

Error: "Multiple columns are specified in an aggregated expression containing an outer reference."

使用多个外部引用时出现外部引用错误

Outer Reference Error When Using Multiple Outer References

sql

sql-server

outer-apply