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Transaction Timeline

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

Finance wants a one-row-per-customer purchase snapshot for the lifetime-value model. For each user with at least one transaction, find their earliest and latest transaction_date and their total spending. Return the username and those three aggregates.

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