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Largest A/B Test by Participants
A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- junior, mid
Problem
The data science team is identifying which A/B test drew the widest audience. Which test had the most unique participants? Return the test name and count for the top one.
Practice This Problem
Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a live PostgreSQL database and grades it instantly.