Find usernames where NOT EXISTS any transaction at all

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

Domain

SQL

Difficulty

medium

Problem

Find usernames where NOT EXISTS any transaction at all. Return user_id and username. Order by user_id.

Practice This Problem

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