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48 lines
1.9 KiB
HTML
48 lines
1.9 KiB
HTML
<p>Table: <code>Employees</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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| employee_id | int |
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| name | varchar |
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| reports_to | int |
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| age | int |
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+-------------+----------+
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employee_id is the column with unique values for this table.
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This table contains information about the employees and the id of the manager they report to. Some employees do not report to anyone (reports_to is null).
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</pre>
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<p> </p>
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<p>For this problem, we will consider a <strong>manager</strong> an employee who has at least 1 other employee reporting to them.</p>
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<p>Write a solution to report the ids and the names of all <strong>managers</strong>, the number of employees who report <strong>directly</strong> to them, and the average age of the reports rounded to the nearest integer.</p>
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<p>Return the result table ordered by <code>employee_id</code>.</p>
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<p>The result format is in the following example.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Employees table:
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+-------------+---------+------------+-----+
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| employee_id | name | reports_to | age |
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+-------------+---------+------------+-----+
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| 9 | Hercy | null | 43 |
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| 6 | Alice | 9 | 41 |
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| 4 | Bob | 9 | 36 |
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| 2 | Winston | null | 37 |
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+-------------+---------+------------+-----+
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<strong>Output:</strong>
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+-------------+-------+---------------+-------------+
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| employee_id | name | reports_count | average_age |
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+-------------+-------+---------------+-------------+
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| 9 | Hercy | 2 | 39 |
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+-------------+-------+---------------+-------------+
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<strong>Explanation:</strong> Hercy has 2 people report directly to him, Alice and Bob. Their average age is (41+36)/2 = 38.5, which is 39 after rounding it to the nearest integer.
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</pre>
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