Loading...
iOS Sessions by Device Type
A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- junior
Problem
The mobile analytics team is preparing a usage report and needs to know the total number of sessions initiated from devices where device_type is 'mobile'. Return the device type and its session count.
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.