Most Profitable Region Month

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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

The finance team wants the single most profitable region and month pairing from 2026. Match each order to the transactions sharing the same ID modulo 100, total the order profit within each region and transaction month, and return the one pairing with the highest total.

Summary

One region, one month. Peak profit.

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