SQL Developer查詢

Question

我有銷售，車輛和客戶的表格，我正在嘗試創建一個查詢，該查詢可以給出購買該類型車輛的客戶的姓名和姓名。我創建了下面的子查詢找到降序汽車銷售：

SELECT Vehicles.Vehicle_Make, 
COUNT(Sales.VIN) AS NumberOfSales 
FROM Sales 
INNER JOIN Vehicles ON Sales.VIN = Vehicles.VIN 
GROUP BY Vehicles.Vehicle_Make 
ORDER BY NumberOfSales DESC; 

和銷售客戶情況表有着共同的cust_id列從中我能得到客戶名和姓。由於第一行會給我最賣車的牌子，我如何查詢第一行並將這個子查詢的結果加入到客戶表中以獲取名字和姓氏？預先感謝您的建議。

Answer 1

事情是這樣的：

select c.* 
from (
    select top 1 
     vehicles.vehicle_make 
    , count(sales.vin) as numberofsales 
    from sales 
    inner join vehicles 
     on sales.vin = vehicles.vin 
    group by vehicles.vehicle_make 
    order by numberofsales desc 
) t 
    inner join vehicles v 
    on v.vehicle_make = t.vehicle_make 
    inner join sales s 
    on s.vehicle_vin = v.vehicle_vin 
    inner join customer c 
    on c.cust_id = s.cust_id