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Weekly Transaction Day Split

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
mid, senior

Interview Prompt

For each week, compute what percentage of that week's transaction volume occurred on Monday versus Sunday. Round to the nearest whole number and return results by week.

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