Platform Check

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

Domain

SQL

Difficulty

easy

Problem

The QA team is profiling performance regressions and wants to see which device and operating system combinations produce the longest user sessions. For each session, show the user ID, device type, operating system, and session duration. Only include sessions that lasted longer than one thousand seconds.

Practice This Problem

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