Data Quality
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
- L4
Interview Prompt
The data engineering team wants to identify databases with a clean migration record. For each database, compute the total number of migrations and total rollbacks. Only return databases that have never had a rollback.
Summary
Failed checks pile up. Which tables need the most attention?
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision