Loading...
Top Campaign by User Revenue
A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- senior
Problem
For each user who clicked an ad, find which campaign generated the most revenue for that user. If multiple campaigns tie for the top, list each qualifying entry only once. Show the user and the top campaign.
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.