User With Most Transactions

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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

The VIP program is honoring the user with the most transactions. Pull their username. If multiple users tie for the top spot, include all of them.

Summary

The most active buyer.

Practice This Problem

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