Chain of Command

A hard SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

hard

Seniority

L5

Problem

Every employee's `manager_id` points to their manager's `employee_id`, except the CEO, whose `manager_id` is `NULL`. Return each employee with their depth beneath the CEO and the full chain of names from the CEO down, joined by / like a file path and listed in path order.

Summary

The tree runs deep. Trace every branch back to the top.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and grades it automatically.