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Push Opens by Platform and Campaign
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 engagement team suspects iOS users are more responsive to push notifications than Android users. Show how many unique users opened a notification on each platform, sorted from most opens to fewest.
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.