Question

我有这个表结构：

TenancyUser

我想要明确，只有销量最高的车辆所以只有这样：

Make    Model   Year    Sales
Toyota  Corolla 2014    15
Toyota  CAMRY   2014    12
Toyota  Camry   2015    7
Toyota  COROLLA 2015    5
Toyota  RAV4    2014    4
Toyota  RAV4    2015    2

Answer 1

按row_number和Make以及Model销售额按降序排列order by分区。
然后选择rn = 1。

的行

;with cte as
(
    select rn=row_number() over
    (
        partition by Make,Model
        order by sales desc
    ),*
    from sales
) 
select Make,Model,[Year],Sales 
from cte
where rn = 1
order by Sales desc;

Fiddle demo

从所有总计中获取不同的值

1 个答案: