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60 lines
1.2 KiB
HTML
60 lines
1.2 KiB
HTML
<p>表: <code>Employee</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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| id | int |
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| salary | int |
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+-------------+------+
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Id是该表的主键列。
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该表的每一行都包含有关员工工资的信息。
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</pre>
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<p> </p>
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<p>编写一个SQL查询来报告 <code>Employee</code> 表中第 <code>n</code> 高的工资。如果没有第 <code>n</code> 个最高工资，查询应该报告为 <code>null</code> 。</p>
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<p>查询结果格式如下所示。</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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<strong>输入:</strong>
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Employee table:
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+----+--------+
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| id | salary |
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+----+--------+
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| 1 | 100 |
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| 2 | 200 |
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| 3 | 300 |
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+----+--------+
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n = 2
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<strong>输出:</strong>
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+------------------------+
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| getNthHighestSalary(2) |
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+------------------------+
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| 200 |
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+------------------------+
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</pre>
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<p><strong>示例 2:</strong></p>
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<pre>
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<strong>输入:</strong>
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Employee 表:
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+----+--------+
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| id | salary |
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+----+--------+
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| 1 | 100 |
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+----+--------+
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n = 2
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<strong>输出:</strong>
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+------------------------+
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| getNthHighestSalary(2) |
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+------------------------+
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| null |
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+------------------------+</pre>
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