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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
The chat_messages table records senders and reply_to references. Find the top 10 most active users by total messages. A user can be either a sender or a receiver (via reply-to). Count both sent and received messages per user, sorted from most active to least, limited to 10.
Summary
The ten most active chat users.
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