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Pipeline Duration vs Throughput

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
senior, staff

Interview Prompt

Does pipeline throughput correlate with duration? For each pipeline, calculate the average duration and the average net row output (rows_out minus 10% of rows_in as overhead). Then compute the correlation between average duration and average net output across all pipelines, rounded to 2 decimals. Return a single correlation value.

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