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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
- Seniority
- L5
Interview Prompt
Our users table has duplicate entries from overlapping import jobs, and the extra rows are fanning out into everything downstream. Write a query that collapses it to a single record per user, keeping the most recent version of each.
Summary
Carbon copies clutter the table. Only the latest matters.
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