418. Reporting Chain Depth

Hard Startup Organizational Analytics

Query Rules

The query columns and order must match the expected result schema.
NULL values should be handled appropriately where applicable.
The grader compares output values and sorting order to evaluate.

Schema Browser

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locations

3 cols

departments

3 cols

employees

6 cols

orders

6 cols

Reference Solution

Expected SQL

WITH RECURSIVE hierarchy AS (SELECT emp_id, manager_id, 0 AS level FROM employees WHERE manager_id IS NULL UNION ALL SELECT e.emp_id, e.manager_id, h.level + 1 FROM employees e JOIN hierarchy h ON e.manager_id = h.emp_id) SELECT level, COUNT(*) AS employee_count FROM hierarchy GROUP BY level ORDER BY level;

SQL Editor

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Console Output

Console Terminal

Write your query and click "Run Query" (Ctrl + Enter) to see results and testcase validation.