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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 to see how each customer's spending accumulates over time. For every row in transactions, compute a per-user running sum of total_amount ordered by transaction_date. Return the user_id, transaction_date, total_amount, and the cumulative spending through that row.

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