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Top 2 Active Push Days
A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- junior, mid
Problem
During a push notification window from August 1 to 7, which two days saw the most unique users receiving a notification? Show the day of week number (0=Sunday through 6=Saturday), date, and unique user 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.