The Revenue Cliff
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
- L4
Interview Prompt
We're tracking monthly revenue and need to catch sharp declines. For each month show its revenue and the month-over-month percentage change, and flag any month that fell more than 10% from the previous month.
Summary
Revenue was climbing. Then it wasn't. Spot the drop.
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