Viewer-to-Purchaser Activity
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
- L4
Interview Prompt
For every user whose very first event was a 'page_view', count how many 'purchase' events they went on to produce. Include users with zero purchases. Return the user ID and purchase count, from highest purchase count down, then user_id ascending.
Summary
Started as viewers. Became creators.
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