For each transaction, show the username, product_name, and a safe revenue calculation (quantity time

A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

medium

Problem

For each transaction, show the username, product_name, and a safe revenue calculation (quantity times price) that never returns NULL. Treat missing quantities as 1 and missing prices as 0.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and grades it automatically.