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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
Seniority
L3

Interview Prompt

Finance needs a one-row-per-customer purchase snapshot for the lifetime-value model. For each customer who has bought something, return their username along with their earliest and latest purchase date and their total spend.

Summary

First purchase to last. The full spending arc.

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

Related

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