Cheapest Transaction per User
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
The pricing team is looking at each user's lowest-value purchase to understand the floor of what people are willing to spend. Show the user ID, username, and their smallest transaction amount, from the lowest up.
Summary
Everyone has a smallest purchase.
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