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

L5

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.

Summary

Which campaign made each user spend the most?

Practice This Problem

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