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Fulfillable Order Percentage

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

Join orders to customers using orders.order_id = customers.customer_id (matching values treated as correspondence). Compute the percentage of orders where the matching customer row has a non-NULL country. Denominator is every orders row. Return a single percentage.

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