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Count Direct Reports
Write a SQL query to find how many direct reports each manager has. Return manager name and report_count. Only include employees who manage at least 1 person. Order by report_count descending.
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Schema
employees
| emp_id | name | department | position | salary | hire_date | manager_id | performance_rating |
|---|---|---|---|---|---|---|---|
| 1 | Alice Johnson | Engineering | Senior Developer | 95000 | 2019-03-15 | 5 | 4.5 |
| 2 | Bob Smith | Engineering | Developer | 75000 | 2020-06-01 | 1 | 3.8 |
| 3 | Carol Williams | Marketing | Marketing Manager | 85000 | 2018-09-20 | NULL | 4.2 |
Expected output: Alice: 3 direct reports
Hint
Concepts
SELECT JOIN GROUP BY Aggregation Self-Join HAVING Self-Join + GROUP BY
Practise the topic: SQL practice questions · JOIN practice · GROUP BY exercises
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