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Peak Activity by Device

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

Domain
SQL
Difficulty
easy
Seniority
L5

Problem

For each device type, find the session time window (from session start to session start plus duration) with the highest number of concurrent users. Show device type, the time period as 'start to end', and user count.

Summary

Activity windows, device by device.

Practice This Problem

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

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