如何从5种畅销产品中获得总销量？

Question

表格结构：

Category
CategoryID|CategoryCode|CategoryName

SubCategory
SubCategoryID|CategoryCode|SubCategoryCode|SubCategoryName

Products
ProductID|CategoryCode|SubCategoryCode|SKU|ProductName|UnitPrice

Orders
OrderID|OrderCode|CustomerCode|EmployeeCode|PurchaseDateTime

Order_Details
OrderDetailID|OrderCode|SKU|Quantity|Price|NetSales

实施例

CategoryCode - 'S'

SubCategoryCode - '08'

SKU - '003'

产品由S08003识别，依此类推

我希望从这个组合产品密钥中识别的5个最畅销产品中获得最高销量...请注意，order_details表中的SKU已经编译完毕。

Answer 1

尝试子选择。

SELECT Order_Details.SKU,
SUM(Order_Details.Quantity * Order_Details.Price) AS Total_Revenue
FROM Order_Details
WHERE Order_Details.SKU IN
 (SELECT X.SKU FROM Order_Details AS X
  ORDER BY SUM(X.Quantity) DESC
  GROUP BY X.SKU LIMIT 5)
GROUP BY Order_Details.SKU;