What the Shelf Never Sold
A medium SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L3
Interview Prompt
A merchandising team needs a revenue report that covers the entire catalog, not only the products that sold. For each product, give the total revenue it brought in, and make sure products that never sold a unit still appear with zero.
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 your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision