Question

我正在尝试使用以下查询获取每张发票的总金额，但我收到以下错误：

Msg 4109，Level 15，State 1，Line 3 窗口函数不能在另一个窗口函数或聚合的上下文中使用。

查询

SELECT
  SP.InvoiceNo,
  Sum(CAST((SPD.Quantity * SPD.UnitPrice) / (SUM(SPD.Quantity * SPD.UnitPrice) OVER ()) * Sp.Shipping_Cost + (SPD.Quantity * SPD.UnitPrice) / (SUM(SPD.Quantity * SPD.UnitPrice) OVER ()) * Sp.Customs_Cost + SPD.Quantity * SPD.UnitPrice - (SPD.Discount / 100) * SPD.Quantity * SPD.UnitPrice AS decimal(10, 2))) AS [Total Amount]
FROM dbo.Stock_Purchase SP
INNER JOIN dbo.Stock_Purchase_Details SPD
  ON SP.Purchase_ID = SPD.Purchase_ID
INNER JOIN dbo.Store S
  ON SPD.Pro_ID = S.Pro_ID
  group by SP.InvoiceNo,SPD.Quantity,SPD.UnitPrice

Answer 1

如错误消息中所述，您无法在sum()over()聚合内使用sum聚合窗口函数。

尝试使用派生表

SELECT InvoiceNo,
       Sum(Cast(( sales ) / ( total_sales ) * Shipping_Cost + ( sales ) / ( total_sales ) * Customs_Cost + sales - ( Discount / 100 ) * sales AS DECIMAL(10, 2))) AS [Total Amount]
FROM   (SELECT SP.InvoiceNo,
               Sp.Shipping_Cost,
               Sp.Customs_Cost,
               SPD.Quantity,
               SPD.UnitPrice,
               Sum(SPD.Quantity * SPD.UnitPrice)
                 OVER()                     AS total_sales,
               SPD.Discount,
               SPD.Quantity * SPD.UnitPrice AS sales
        FROM   dbo.Stock_Purchase SP
               INNER JOIN dbo.Stock_Purchase_Details SPD
                       ON SP.Purchase_ID = SPD.Purchase_ID
               INNER JOIN dbo.Store S
                       ON SPD.Pro_ID = S.Pro_ID) a
GROUP  BY InvoiceNo,
          Quantity,
          UnitPrice

我想通过添加样本数据和预期结果可以改进查询

Answer 2

我相信你想要这样的东西：

SELECT SP.InvoiceNo,
       SUM(SPD.Quantity * SPD.UnitPrice * (1 - SP.Discount)) + sp.Shipping_Cost as Total_amount
FROM dbo.Stock_Purchase SP INNER JOIN
     dbo.Stock_Purchase_Details SPD
     ON SP.Purchase_ID = SPD.Purchase_ID INNER JOIN
     dbo.Store S
     ON SPD.Pro_ID = S.Pro_ID
GROUP BY SP.InvoiceNo, sp.Shipping_Cost;

注意：

总费用的计算是有根据的猜测。从你的代码中获得计算的意图几乎是不可能的。
您的GROUP BY列太多了。
此计算似乎不需要窗函数。

错误：窗口函数不能在另一个窗口函数或聚合的上下文中使用

2 个答案: