Multi-Month Active Users

A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain

SQL

Difficulty

hard

Seniority

mid

Interview Prompt

Identify users who logged sessions in at least 3 separate calendar months, based on session_start dates from user_sessions. Return the user ID.

How This Interview Works

1. Read the vague prompt (just like a real interview)
2. Ask clarifying questions to the AI interviewer
3. Write your sql solution with real code execution
4. Get instant feedback and a hire/no-hire decision