Top Mobile OS by Session Duration

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

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

Which mobile OS keeps users longest?

Practice This Problem

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