Category Sales Summary

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

Domain

SQL

Difficulty

easy

Seniority

junior

Problem

The merchandising team needs a 2026 sales overview by product category. For each category with at least one sale, show the number of unique transactions and total revenue, sorted from highest revenue to lowest.

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.