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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
junior

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.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your sql solution with real code execution
  4. Get instant feedback and a hire/no-hire decision