Return user_id, COUNT(DISTINCT product_id) AS unique_products, and COUNT(*) AS total_tx from transac
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
Interview Prompt
Return user_id, COUNT(DISTINCT product_id) AS unique_products, and COUNT(*) AS total_tx from transactions. Filter to users where unique_products >= 2. Order by unique_products DESC, user_id.
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