题解 | 商品价格排名

select product_id,product_name,type,price
from (select product_id,product_name,type,price,DENSE_RANK()over(partition by type order by price desc) as rk2
from (select product_id,product_name,DENSE_RANK()over(partition by type order by price desc) as rk1,type,price
from product_info) as temp1
where rk1 <= 2) as temp2
where rk2 <= 2
order by price desc,product_name
limit 3