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

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

FinOps wants to spot bumpy cloud bills service by service. For every individual bill, list the service, the billing date, the amount, and how much that bill moved versus the service's previous bill. The first bill on record for a service has nothing to compare against. Walk the bills service by service, oldest to newest.

Summary

Cost trends across billing periods.

Practice This Problem

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