Provider Spend Variance Between Halves

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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

Compare cloud spend between the first half (Jan through Jun) and second half (Jul through Dec) of 2026. For each provider, compute the total amount in each half, then show the difference (second half minus first half). Rank providers from biggest increase to smallest. Return the provider and amount difference.

Summary

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

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