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34 lines
661 B
HTML
34 lines
661 B
HTML
<p>某网站包含两个表，<code>Customers</code> 表和 <code>Orders</code> 表。编写一个 SQL 查询，找出所有从不订购任何东西的客户。</p>
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<p><code>Customers</code> 表：</p>
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<pre>+----+-------+
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| Id | Name |
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+----+-------+
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| 1 | Joe |
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| 2 | Henry |
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| 3 | Sam |
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| 4 | Max |
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+----+-------+
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</pre>
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<p><code>Orders</code> 表：</p>
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<pre>+----+------------+
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| Id | CustomerId |
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+----+------------+
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| 1 | 3 |
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| 2 | 1 |
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+----+------------+
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</pre>
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<p>例如给定上述表格，你的查询应返回：</p>
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<pre>+-----------+
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| Customers |
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+-----------+
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| Henry |
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| Max |
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+-----------+
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</pre>
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