# March Revenue by Customer

> One month, every customer, every dollar accounted for.

Canonical URL: <https://datadriven.io/problems/march_revenue_by_customer>

Domain: SQL · Difficulty: medium · Seniority: L3

## Problem

Finance is breaking down March 2025 revenue by customer. For every user with at least one transaction in that month, show the user ID and the total they spent. Sort from biggest spender to smallest, with the user ID as the tiebreaker.

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