题解 | 每个商品的销售总额
每个商品的销售总额
https://www.nowcoder.com/practice/6d796e885ee44a9cb599f47b16a02ea4
select p.name as product_name,
SUM(o.quantity) AS total_sales,
dense_rank() over(partition by p.category
order by sum(o.quantity) desc)as category_rank
from products p
inner join orders o
using(product_id)
group by p.product_id, p.name, p.category
order by p.category asc, total_sales desc, p.product_id asc
