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52 lines
1.9 KiB
HTML
52 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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| manager_id | int |
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| salary | int |
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+-------------+----------+
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In SQL, employee_id is the primary key for this table.
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This table contains information about the employees, their salary, and the ID of their manager. Some employees do not have a manager (manager_id is null).
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</pre>
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<p> </p>
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<p>Find the IDs of the employees whose salary is strictly less than <code>$30000</code> and whose manager left the company. When a manager leaves the company, their information is deleted from the <code>Employees</code> table, but the reports still have their <code>manager_id</code> set to the manager that left.</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 | manager_id | salary |
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+-------------+-----------+------------+--------+
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| 3 | Mila | 9 | 60301 |
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| 12 | Antonella | null | 31000 |
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| 13 | Emery | null | 67084 |
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| 1 | Kalel | 11 | 21241 |
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| 9 | Mikaela | null | 50937 |
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| 11 | Joziah | 6 | 28485 |
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+-------------+-----------+------------+--------+
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<strong>Output:</strong>
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+-------------+
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| employee_id |
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+-------------+
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| 11 |
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+-------------+
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<strong>Explanation:</strong>
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The employees with a salary less than $30000 are 1 (Kalel) and 11 (Joziah).
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Kalel's manager is employee 11, who is still in the company (Joziah).
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Joziah's manager is employee 6, who left the company because there is no row for employee 6 as it was deleted.
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</pre>
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