mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-11 02:58:13 +08:00
76 lines
2.4 KiB
HTML
76 lines
2.4 KiB
HTML
<p>Table: <code>Sales</code></p>
|
|
|
|
<pre>
|
|
+-------------+-------+
|
|
| Column Name | Type |
|
|
+-------------+-------+
|
|
| sale_id | int |
|
|
| product_id | int |
|
|
| year | int |
|
|
| quantity | int |
|
|
| price | int |
|
|
+-------------+-------+
|
|
(sale_id, year) is the primary key (combination of columns with unique values) of this table.
|
|
product_id is a foreign key (reference column) to <code>Product</code> table.
|
|
Each row of this table shows a sale on the product product_id in a certain year.
|
|
Note that the price is per unit.
|
|
</pre>
|
|
|
|
<p> </p>
|
|
|
|
<p>Table: <code>Product</code></p>
|
|
|
|
<pre>
|
|
+--------------+---------+
|
|
| Column Name | Type |
|
|
+--------------+---------+
|
|
| product_id | int |
|
|
| product_name | varchar |
|
|
+--------------+---------+
|
|
product_id is the primary key (column with unique values) of this table.
|
|
Each row of this table indicates the product name of each product.
|
|
</pre>
|
|
|
|
<p> </p>
|
|
|
|
<p>Write a solution to report the <code>product_name</code>, <code>year</code>, and <code>price</code> for each <code>sale_id</code> in the <code>Sales</code> table.</p>
|
|
|
|
<p>Return the resulting table in <strong>any order</strong>.</p>
|
|
|
|
<p>The result format is in the following example.</p>
|
|
|
|
<p> </p>
|
|
<p><strong class="example">Example 1:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong>
|
|
Sales table:
|
|
+---------+------------+------+----------+-------+
|
|
| sale_id | product_id | year | quantity | price |
|
|
+---------+------------+------+----------+-------+
|
|
| 1 | 100 | 2008 | 10 | 5000 |
|
|
| 2 | 100 | 2009 | 12 | 5000 |
|
|
| 7 | 200 | 2011 | 15 | 9000 |
|
|
+---------+------------+------+----------+-------+
|
|
Product table:
|
|
+------------+--------------+
|
|
| product_id | product_name |
|
|
+------------+--------------+
|
|
| 100 | Nokia |
|
|
| 200 | Apple |
|
|
| 300 | Samsung |
|
|
+------------+--------------+
|
|
<strong>Output:</strong>
|
|
+--------------+-------+-------+
|
|
| product_name | year | price |
|
|
+--------------+-------+-------+
|
|
| Nokia | 2008 | 5000 |
|
|
| Nokia | 2009 | 5000 |
|
|
| Apple | 2011 | 9000 |
|
|
+--------------+-------+-------+
|
|
<strong>Explanation:</strong>
|
|
From sale_id = 1, we can conclude that Nokia was sold for 5000 in the year 2008.
|
|
From sale_id = 2, we can conclude that Nokia was sold for 5000 in the year 2009.
|
|
From sale_id = 7, we can conclude that Apple was sold for 9000 in the year 2011.
|
|
</pre>
|