Campaign Cost Effectiveness
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
- L3
Interview Prompt
The marketing team is evaluating return on ad spend across the last two years, 2025 through 2026. For each campaign, show its cost-effectiveness as total revenue over total clicks.
Summary
Money in, conversions out. What is the ratio?
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