Kings for a Day
A medium SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L5
Interview Prompt
We run a batch-processing platform where jobs record how many rows they moved and the time they started. For each calendar day, find the job that moved the most rows, and return the day, the job name, and its row count.
Summary
Every day, one job moves more rows than all the rest.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision