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88 lines
2.4 KiB
HTML
88 lines
2.4 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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| name | varchar |
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| salary | int |
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| departmentId | int |
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+--------------+---------+
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Id是该表的主键列。
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departmentId是Department表中ID的外键。
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该表的每一行都表示员工的ID、姓名和工资。它还包含了他们部门的ID。
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</pre>
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<p> </p>
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<p>表: <code>Department</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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| name | varchar |
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+-------------+---------+
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Id是该表的主键列。
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该表的每一行表示部门ID和部门名。
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</pre>
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<p> </p>
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<p>公司的主管们感兴趣的是公司每个部门中谁赚的钱最多。一个部门的 <strong>高收入者</strong> 是指一个员工的工资在该部门的 <strong>不同</strong> 工资中 <strong>排名前三</strong> 。</p>
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<p>编写一个SQL查询，找出每个部门中 <strong>收入高的员工</strong> 。</p>
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<p>以 <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 表:
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+----+-------+--------+--------------+
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| id | name | salary | departmentId |
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+----+-------+--------+--------------+
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| 1 | Joe | 85000 | 1 |
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| 2 | Henry | 80000 | 2 |
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| 3 | Sam | 60000 | 2 |
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| 4 | Max | 90000 | 1 |
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| 5 | Janet | 69000 | 1 |
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| 6 | Randy | 85000 | 1 |
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| 7 | Will | 70000 | 1 |
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+----+-------+--------+--------------+
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Department 表:
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+----+-------+
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| id | name |
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+----+-------+
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| 1 | IT |
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| 2 | Sales |
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+----+-------+
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<strong>输出:</strong>
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+------------+----------+--------+
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| Department | Employee | Salary |
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+------------+----------+--------+
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| IT | Max | 90000 |
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| IT | Joe | 85000 |
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| IT | Randy | 85000 |
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| IT | Will | 70000 |
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| Sales | Henry | 80000 |
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| Sales | Sam | 60000 |
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+------------+----------+--------+
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<strong>解释:
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</strong>在IT部门:
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- Max的工资最高
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- 兰迪和乔都赚取第二高的独特的薪水
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- 威尔的薪水是第三高的
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在销售部:
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- 亨利的工资最高
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- 山姆的薪水第二高
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- 没有第三高的工资，因为只有两名员工</pre>
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