Promo Campaign Cost per Acquisition
A easy SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
For promo campaigns (campaign names containing 'promo'), compute the cost-per-acquisition by year: total notifications divided by total opens. Show the campaign, year, and the resulting ratio.
Summary
The campaign ran. What did each customer cost?
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