Spending Range

A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain

SQL

Difficulty

hard

Seniority

L5

Interview Prompt

Data science is modeling per-user spending variability. For each customer, return their username, their smallest and largest transaction amount, and the gap between the two.

Summary

Between the smallest purchase and the biggest lies the story.

How This Interview Works

1. Read the vague prompt (just like a real interview)
2. Ask clarifying questions to the AI interviewer
3. Write your sql solution with real code execution
4. Get instant feedback and a hire/no-hire decision