Top Percentile Spenders
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
- L7
Interview Prompt
The bar for the top third is not a dollar figure: it sits wherever this window's buyers land against each other, each judged on everything they paid over the last 90 days of `transactions` rather than on any single purchase. Return the customers above that bar with each one's total.
Summary
Top 1% of users by total spend via percentile bucketing.
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