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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
mid

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.

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.