One Year to the Next
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
- L5
Interview Prompt
We track how many users sign up each year and want to see whether that number is climbing or falling. For each year, report the signup count alongside the percentage change from the prior year's total, rounded to the nearest whole percent.
Summary
This year versus last year. Growing or shrinking?
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