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The Cannibalization Report

A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
SQL
Difficulty
hard
Seniority
staff

Interview Prompt

Given a products table (with launch dates and categories) and a transactions table, write a query to measure product launch cannibalization. For each product launched in the last 6 months, compare the category's total sales in the 30 days before launch vs. the 30 days after. Return the product name, category, pre-launch sales, post-launch sales, and percentage change.

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