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71 lines
2.2 KiB
HTML
71 lines
2.2 KiB
HTML
<p>销售表 <code>Sales</code>：</p>
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<pre>
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+-------------+-------+
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| Column Name | Type |
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+-------------+-------+
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| sale_id | int |
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| product_id | int |
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| year | int |
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| quantity | int |
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| price | int |
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+-------------+-------+
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(sale_id, year) 是销售表 Sales 的主键（具有唯一值的列的组合）。
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product_id 是关联到产品表 Product 的外键（reference 列）。
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该表的每一行显示 product_id 在某一年的销售情况。
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注意: price 表示每单位价格。
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</pre>
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<p>产品表 <code>Product</code>：</p>
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<pre>
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+--------------+---------+
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| Column Name | Type |
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+--------------+---------+
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| product_id | int |
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| product_name | varchar |
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+--------------+---------+
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product_id 是表的主键（具有唯一值的列）。
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该表的每一行表示每种产品的产品名称。
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</pre>
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<p> </p>
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<p>编写解决方案，以获取 <code>Sales</code> 表中所有 <code>sale_id</code> 对应的 <code>product_name</code> 以及该产品的所有<strong> </strong><code>year</code> 和<strong> </strong><code>price</code> 。</p>
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<p>返回结果表 <strong>无顺序要求</strong> 。</p>
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<p>结果格式示例如下。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<code><strong>输入：</strong>
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Sales</code> 表：
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+---------+------------+------+----------+-------+
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| sale_id | product_id | year | quantity | price |
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+---------+------------+------+----------+-------+
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| 1 | 100 | 2008 | 10 | 5000 |
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| 2 | 100 | 2009 | 12 | 5000 |
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| 7 | 200 | 2011 | 15 | 9000 |
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+---------+------------+------+----------+-------+
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Product 表：
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+------------+--------------+
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| product_id | product_name |
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+------------+--------------+
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| 100 | Nokia |
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| 200 | Apple |
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| 300 | Samsung |
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+------------+--------------+
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<strong>输出：</strong>
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+--------------+-------+-------+
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| product_name | year | price |
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+--------------+-------+-------+
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| Nokia | 2008 | 5000 |
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| Nokia | 2009 | 5000 |
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| Apple | 2011 | 9000 |
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+--------------+-------+-------+
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</pre>
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