From transactions, use ROW_NUMBER() to deduplicate by (user_id, product_id): keep only the latest tr

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

Interview Prompt

From transactions, use ROW_NUMBER() to deduplicate by (user_id, product_id): keep only the latest transaction per user-product pair. Return transaction_id, user_id, product_id, transaction_date, total_amount. Order by user_id, product_id.

How This Interview Works

1. Read the vague prompt (just like a real interview)
2. Ask clarifying questions to the AI interviewer
3. Write your sql solution with real code execution
4. Get instant feedback and a hire/no-hire decision