Between Worlds

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

Domain

SQL

Difficulty

easy

Seniority

L4

Problem

Find the users whose sessions span more than one operating system. Return every session those users logged, with user ID, OS name, device type, and session start.

Summary

iOS today, Android tomorrow.

Practice This Problem

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