The Turning Tide

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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

Finance is reviewing whether cloud spend climbed or fell across 2026, comparing the first half (Jan through Jun) against the second half (Jul through Dec). For each provider, show how much second-half spend rose above the first half, biggest increase first.

Summary

Two time windows. Did the cloud bill go up or down?

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and checks it automatically.