目录 题目 分析 代码 题目 产品数据表: Products +---------------+---------+| Column Name | Type |+---------------+---------+| product_id | int || new_price | int || change_date | d
产品数据表: Products +---------------+---------+| Column Name | Type |+---------------+---------+| product_id | int || new_price | int || change_date | date |+--------------