The Ones They Opened
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
Our push notification system records an `opened` flag on every notification along with the campaign that sent it. Find the campaigns that pulled more opens than the average campaign, listed with the most opens first.
Summary
Every campaign fights for the tap. Find the ones beating the field.
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