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Normalize a flat invoice table into a fully normalized schema

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

Domain
Data Modeling
Difficulty
medium

Interview Prompt

Normalize a flat invoice table into a fully normalized schema. Create separate tables for customers, invoices, and invoice line items with proper keys and relationships.

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 data modeling solution with real code execution
  4. Get instant feedback and a hire/no-hire decision

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