From users, return user_id and COALESCE(age_bucket, 'unknown') AS age_group

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

Domain

SQL

Difficulty

medium

Interview Prompt

From users, return user_id and COALESCE(age_bucket, 'unknown') AS age_group. Group by age_group and count users_in_group. Order by users_in_group DESC, age_group.

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