Rolling Weekly Total

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

Domain

SQL

Difficulty

medium

Seniority

L5

Interview Prompt

A fraud detection model monitors spending velocity. Return every transaction along with a rolling 7-day spending total for the same user, ordered by transaction date. Include user_id, transaction_date, total_amount, and the rolling sum.

Summary

Seven days at a time, the totals keep rolling forward.

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