📢 본 포스팅에 활용되는 기본 문제 및 자료 출처는 리트코드 Problems, https://leetcode.com/problemset/all/임을 밝힙니다. ✔ 문제 https://leetcode.com/problems/product-sales-analysis-iii/description/ Product Sales Analysis III - LeetCode Can you solve this real interview question? Product Sales Analysis III - Table: Sales +-------------+-------+ | Column Name | Type | +-------------+-------+ | sale_id | int | | product_id | int | ..
