sql - Query two tables (get max from 2 columns on 2nd table)

Question

I have two tables,

First: Cars ID(primary),Name

Second : Sold ID(primary),CarID,Price,SoldUnits

How i can query to get car name where (Price * SoldUnits) is maximum?

Answer 1

要找到最畅销的汽车：

select  top 1 c.name
from    cars c
join    sold s
on      s.CarID = c.ID
group by
        c.Name
order by
        sum(Price * SoldUnits) desc

要查找单笔销量最高的汽车：

select  top 1 c.name
from    cars c
join    sold s
on      s.CarID = c.ID
order by
        Price * SoldUnits desc