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Campaign Bookend Engagement
A hard SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- senior
Problem
For each ad campaign, what percentage of its total impressions happened on the campaign's very first day versus its very last day?
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.