#1.先求出每个商品类型的价格的前2名的商品。 #2.在将上述的商品在进行个排序,取前三。 with tiaojian as ( select product_id, product_name, type, price, dense_rank()over(partition by type order by price desc) as pf from product_info ) select t.product_id, t.product_name, t.type, t.price from( select product_id, product_name, type, price,...