Cheapest Transaction per User

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 pricing team is looking at each user's lowest-value purchase to understand the floor of what people are willing to spend. Show the user ID, username, and their smallest transaction amount, from the lowest up.

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.