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Daily Metric Percentage Change

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
senior

Interview Prompt

Given a deploy_logs table with service name and deploy timestamp, write a query that computes the day-over-day percentage change in deployment count for each service. Exclude the first day per service since there is no prior baseline.

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