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A easy SQL interview practice problem on DataDriven. Write and execute real sql code with instant feedback.

Domain
SQL
Difficulty
easy
Seniority
L3

Problem

Which mobile operating system has the highest average session duration? Show just the top OS and its average.

Summary

Attention is the scarcest resource. Find the platform that holds it longest.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and checks it automatically.

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