Top Identified Event Types
A medium SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
Find the top 3 event types by total records, but only those where identified (non-null user_id) events outnumber anonymous (null user_id) events. Rank by total events, most frequent first. Return the event type and total event count.
Summary
The top users by events, but only the identifiable ones.
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