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Average Session Duration

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
L3

Interview Prompt

The engagement team wants each user's average session duration, defined as their total time in sessions divided by their total number of sessions. Exclude any sessions missing a recorded duration. Return the user ID and their average.

Summary

How long do users actually stay?

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

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