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Unique Reporters per Content

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
mid

Interview Prompt

In the chat data, each message can be a reply to content. For each content reference, count unique reporters identified by combining sender and channel. Only count messages that are replies (reply_to is not null). Return the content ID and the reporter count.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your sql solution with real code execution
  4. Get instant feedback and a hire/no-hire decision