Question

我的查询返回包含客户名和姓的2列的SUM。

返回约40000条记录。我的疑问是： -

SELECT  SUM(Orders.BusinessVolumeTotal) AS BV,
        SUM(Orders.CommissionableVolumeTotal) AS PV,
        ISNULL(Customers.FirstName,''), Customers.LastName
FROM    Customers INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID
WHERE   Orders.OrderDate >= convert(DATETIME, '1/1/2013 12:00:00 AM')
        AND Orders.OrderDate < convert(DATETIME, '12/31/2013 12:00:00 AM')
GROUP BY Customers.FirstName, Customers.LastName

但我只想在BV和PV coluymns中返回10行值最高的行。

提前致谢。

Answer 1

如果您希望每组有10个最高行，则可以在ROW_NUMBER中使用CTE：

WITH CTE AS
(
    SELECT SUM(Orders.BusinessVolumeTotal) OVER(PARTITION BY Customers.FirstName, Customers.LastName) AS BV, 
           SUM(Orders.CommissionableVolumeTotal) OVER(PARTITION BY Customers.FirstName, Customers.LastName) AS PV, 
           ISNULL(Customers.FirstName,'') As FirstName, 
           Customers.LastName,
       RN = ROW_NUMBER() 
              OVER(PARTITION BY Customers.FirstName, Customers.LastName
                   ORDER BY (Orders.BusinessVolumeTotal + Orders.CommissionableVolumeTotal) DESC) 
    FROM Customers INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID
    WHERE  Orders.OrderDate >= convert(DATETIME, '1/1/2013 12:00:00 AM')
    AND Orders.OrderDate < convert(DATETIME, '12/31/2013 12:00:00 AM')        
)
SELECT * FROM CTE WHERE RN <= 10

Answer 2

根据两列的组，您可以获得如下所示的前10行：

SELECT  TOP 10
        SUM(Orders.BusinessVolumeTotal) AS BV,
        SUM(Orders.CommissionableVolumeTotal) AS PV,
        ISNULL(Customers.FirstName,''), Customers.LastName
FROM    Customers INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID
WHERE   Orders.OrderDate >= convert(DATETIME, '1/1/2013 12:00:00 AM')
        AND Orders.OrderDate < convert(DATETIME, '12/31/2013 12:00:00 AM')
GROUP BY Customers.FirstName, Customers.LastName
ORDER BY SUM(Orders.BusinessVolumeTotal) + SUM(Orders.CommissionableVolumeTotal) DESC

Answer 3

获得BV前10名和PV前10名的一种方法是为每个人写一个查询：

SELECT TOP 10
SUM(Orders.BusinessVolumeTotal) AS BV, SUM(Orders.CommissionableVolumeTotal) AS PV, ISNULL(Customers.FirstName,''), Customers.LastName
FROM         Customers INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID
 WHERE  Orders.OrderDate >= convert(DATETIME, '1/1/2013 12:00:00 AM')
                    AND Orders.OrderDate < convert(DATETIME, '12/31/2013 12:00:00 AM')
                    GROUP BY Customers.FirstName, Customers.LastName
ORDER BY BV DESC

SELECT TOP 10
SUM(Orders.BusinessVolumeTotal) AS BV, SUM(Orders.CommissionableVolumeTotal) AS PV, ISNULL(Customers.FirstName,''), Customers.LastName
FROM         Customers INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID
 WHERE  Orders.OrderDate >= convert(DATETIME, '1/1/2013 12:00:00 AM')
                    AND Orders.OrderDate < convert(DATETIME, '12/31/2013 12:00:00 AM')
                    GROUP BY Customers.FirstName, Customers.LastName
ORDER BY PV DESC

Sql查询获取最高值为2列的顶级记录

3 个答案: