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

L3

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.

Summary

Opens by platform and campaign.

Practice This Problem

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