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First Deploy Attribution
A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- mid
Problem
The release engineering team wants to measure onboarding velocity: how often are engineers deploying to a service for the very first time? For each service, show the total deployment count alongside how many of those were an author's first-ever deployment to that service.
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.