95. Simple CTE for Recursive Hierarchy

Hard TCS Subqueries & CTEs

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, name, manager_id FROM employees WHERE manager_id IS NULL UNION ALL SELECT e.emp_id, e.name, e.manager_id FROM employees e JOIN hierarchy h ON e.manager_id = h.emp_id) SELECT * FROM hierarchy;

SQL Editor

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Console Output

Console Terminal

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