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Friday Sessions for Shared Experiments
A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- senior
Problem
For each Friday, count sessions where the session's user is enrolled in an experiment that at least one other user is also enrolled in. Show the date and total session count, ordered chronologically.
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.