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62 lines
1.9 KiB
HTML
62 lines
1.9 KiB
HTML
<p><code>World</code> 表：</p>
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<div class="top-view__1vxA">
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<div class="original__bRMd">
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<div>
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<pre>
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+-------------+---------+
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| Column Name | Type |
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+-------------+---------+
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| name | varchar |
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| continent | varchar |
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| area | int |
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| population | int |
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| gdp | int |
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+-------------+---------+
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name 是这张表的主键。
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这张表的每一行提供：国家名称、所属大陆、面积、人口和 GDP 值。
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</pre>
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<p> </p>
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<p>如果一个国家满足下述两个条件之一，则认为该国是 <strong>大国</strong> ：</p>
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<ul>
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<li>面积至少为 300 平方公里（即，<code>3000000 km<sup>2</sup></code>），或者</li>
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<li>人口至少为 2500 万（即 <code>25000000</code>）</li>
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</ul>
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<p>编写一个 SQL 查询以报告 <strong>大国</strong> 的国家名称、人口和面积。</p>
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<p>按 <strong>任意顺序</strong> 返回结果表。</p>
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<p>查询结果格式如下例所示。</p>
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<p> </p>
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<p><strong>示例：</strong></p>
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<pre>
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<strong>输入：</strong>
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World 表：
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+-------------+-----------+---------+------------+--------------+
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| name | continent | area | population | gdp |
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+-------------+-----------+---------+------------+--------------+
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| Afghanistan | Asia | 652230 | 25500100 | 20343000000 |
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| Albania | Europe | 28748 | 2831741 | 12960000000 |
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| Algeria | Africa | 2381741 | 37100000 | 188681000000 |
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| Andorra | Europe | 468 | 78115 | 3712000000 |
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| Angola | Africa | 1246700 | 20609294 | 100990000000 |
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+-------------+-----------+---------+------------+--------------+
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<strong>输出：</strong>
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+-------------+------------+---------+
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| name | population | area |
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+-------------+------------+---------+
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| Afghanistan | 25500100 | 652230 |
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| Algeria | 37100000 | 2381741 |
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+-------------+------------+---------+
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</pre>
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</div>
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</div>
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</div>
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