如何查看每个员工在哪个类别中销售的商品最多？我只能显示员工姓名和已售出的商品

Question

整个table

USE Northwind
SELECT MAX(TotalOrder)


FROM vwEmployesAndMostSoldCategories
GROUP MAX(TotalOrder)

我只能输出什么

USE Northwind
SELECT
   FullName
   , MAX(TotalOrder) AS TheMaxSoldUnits
FROM vwEmployesAndMostSoldCategories
GROUP BY FullName

Answer 1

您可以在此处使用 TOP 查询：

WITH cte AS (
    SELECT FullName, CatgegoryName,
           SUM(TotalOrder) AS SumTotalOrder,
           ROW_NUMBER() OVER (PARTITION BY FullName
                              ORDER BY SUM(TotalOrder) DESC) rn
    FROM vwEmployesAndMostSoldCategories
    GROUP BY FullName, CategoryName
)

SELECT FullName, CategoryName, SumTotalOrder AS TotalOrder
FROM cte
WHERE rn = 1;

如果给定的员工可能并列因为有两个或更多类别的订单总数相同，而您想要显示所有并列，则替换 ROW_NUMBER， RANK.

Answer 2

如果我没听错，你可以使用 with ties:

select top (1) with ties e.*
from vwEmployesAndMostSoldCategories e
order by rank() over(partition by fullname order by totalorders desc)

对于每位员工，此 returns 具有最大 totalorders 的行（如果存在最高关联，则返回同一员工的所有关联行）。看来你不需要在这里聚合。

如何查看每个员工在哪个类别中销售的商品最多？我只能显示员工姓名和已售出的商品

How to check in which category each employee has sold the most goods? I can display only employee's name and sold goods

sql

sql-server-2008

mssql-jdbc