The Turning Tide

A medium SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.

Domain
SQL
Difficulty
medium
Seniority
L4

Interview Prompt

An analyst closing the books on 2026 is comparing each cloud provider's spend in `cloud_costs` across the two halves of the year. Report how each provider's spend changed from January through June to July through December.

Summary

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

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write and run your SQL against a real database
  4. Answer the interviewer's follow-up questions, then get a hire or no-hire decision