{ "data": { "question": { "questionId": "1155", "questionFrontendId": "1070", "categoryTitle": "Database", "boundTopicId": 7635, "title": "Product Sales Analysis III", "titleSlug": "product-sales-analysis-iii", "content": "

Table: Sales

\n\n
\n+-------------+-------+\n| Column Name | Type  |\n+-------------+-------+\n| sale_id     | int   |\n| product_id  | int   |\n| year        | int   |\n| quantity    | int   |\n| price       | int   |\n+-------------+-------+\n(sale_id, year) is the primary key (combination of columns with unique values) of this table.\nproduct_id is a foreign key (reference column) to Product table.\nEach row records a sale of a product in a given year.\nA product may have multiple sales entries in the same year.\nNote that the per-unit price.\n\n
\n\n

Write a solution to find all sales that occurred in the first year each product was sold.

\n\n\n\n

Return a table with the following columns: product_id, first_year, quantity, and price.
\nReturn the result in any order.

\n\n

 

\n

Example 1:

\n\n
\nInput: \nSales table:\n+---------+------------+------+----------+-------+\n| sale_id | product_id | year | quantity | price |\n+---------+------------+------+----------+-------+ \n| 1       | 100        | 2008 | 10       | 5000  |\n| 2       | 100        | 2009 | 12       | 5000  |\n| 7       | 200        | 2011 | 15       | 9000  |\n+---------+------------+------+----------+-------+\n\nOutput: \n+------------+------------+----------+-------+\n| product_id | first_year | quantity | price |\n+------------+------------+----------+-------+ \n| 100        | 2008       | 10       | 5000  |\n| 200        | 2011       | 15       | 9000  |\n+------------+------------+----------+-------+\n
\n", "translatedTitle": "产品销售分析 III", "translatedContent": "

销售表 Sales：

\n\n
\n+-------------+-------+\n| Column Name | Type  |\n+-------------+-------+\n| sale_id     | int   |\n| product_id  | int   |\n| year        | int   |\n| quantity    | int   |\n| price       | int   |\n+-------------+-------+\n(sale_id, year) 是这张表的主键（具有唯一值的列的组合）。\nproduct_id 是产品表的外键（reference 列）。\n这张表的每一行都表示：编号 product_id 的产品在某一年的销售额。\n一个产品可能在同一年内有多个销售条目。\n请注意，价格是按每单位计的。\n
\n\n

编写解决方案，选出每个售出过的产品 第一年 销售的 产品 id、年份、数量 和 价格。

\n\n\n\n

返回一张有这些列的表：product_id，first_year，quantity 和 price。

\n\n

结果表中的条目可以按 任意顺序 排列。

\n\n

 

\n\n

示例 1：

\n\n
\n输入：\nSales 表：\n+---------+------------+------+----------+-------+\n| sale_id | product_id | year | quantity | price |\n+---------+------------+------+----------+-------+ \n| 1       | 100        | 2008 | 10       | 5000  |\n| 2       | 100        | 2009 | 12       | 5000  |\n| 7       | 200        | 2011 | 15       | 9000  |\n+---------+------------+------+----------+-------+\n输出：\n+------------+------------+----------+-------+\n| product_id | first_year | quantity | price |\n+------------+------------+----------+-------+ \n| 100        | 2008       | 10       | 5000  |\n| 200        | 2011       | 15       | 9000  |\n+------------+------------+----------+-------+
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