User Devices

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

Domain

SQL

Difficulty

medium

Problem

The personalization team wants to know which platforms each user actually engages on. For every user with at least one session, show the distinct device types they've used alongside their username.

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.