Best in Class

A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

medium

Seniority

mid

Problem

We run an online marketplace where every category has one clear top earner. For each product category, find the product that brought in the most revenue, listed from the highest earner down.

Summary

Every category crowns exactly one earner. Find who wears it.

Practice This Problem

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