Where The Rows Go
A easy SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- L5
Interview Prompt
The data platform team measures how efficiently each pipeline run turns the rows it reads into the rows it writes back out. For every run, show the pipeline name, its start time, and the ratio of rows written to rows read to four decimal places, ordered by pipeline name and then start time.
Summary
Every run loses a little on the way. Measure what makes it through.
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