Department Running Totals
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
- L5
Interview Prompt
Ahead of the annual budget cycle, the CFO wants to see how each department's metric values accumulate quarter over quarter. Return every metric record with a column showing metric_value accumulated within each department, sequenced by fiscal year and quarter.
Summary
Compute cumulative metric values within each department using window operations.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision