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Normalization Tradeoffs in Practice
A hard SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- senior, staff
Problem
The finance team needs total revenue per product category, where revenue for a transaction is defined as the quantity sold times the listed price of the product. Order results by category.
Practice This Problem
Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a live PostgreSQL database and grades it instantly.