Who We Reached
A easy SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
The growth team is tracking how each ad campaign's reach moves month over month, where every impression falls within a single year. For each campaign and calendar month, find how many different users saw an impression, sorted by campaign and then by month.
Summary
Monthly reach, campaign by campaign.
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