Kings of the Calendar
A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L4
Interview Prompt
We publish a monthly best-sellers leaderboard for an online marketplace, where a product's standing in a calendar month is set by its total units sold that month. For each month, return the leading products with their total units sold and standing.
Summary
Every month has a winner.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision