Where the Money Pools
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
- mid
Interview Prompt
We run a card-payments platform, and merchandising wants to see where this year's spend is concentrating across product categories. For each category, show its 2026 revenue and that revenue as a plain fraction of the year's total spend (a value between 0 and 1, not rounded), biggest categories first.
Summary
Every category takes a slice of the year's spend. Find who takes the most.
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