What the Shelf Never Sold
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
- L3
Interview Prompt
List every product in the catalog with its revenue, where a product's revenue is the total amount buyers were charged across all of its transactions. It feeds the merchandising team's catalog-wide revenue report.
Summary
Some products never moved a single unit. They still belong on the report.
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