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SQL Query to Find Average Sessions per User within 30-day period

SQLmedium0.4 min readPremium
Frequency
Low
Asked at 1 company
Category
487
questions in SQL
Difficulty Split
130E|271M|86H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Meesho
Key Concepts Tested
sqlwindow
Expert AnswerPremium
81 wordsInterview-ready
Avg sessions per user in 30 days: SELECT user_id, COUNT(DISTINCT session_id)/30.0 AS avg_sessions_per_day FROM events WHERE event_date >= CURRENT_DATE - 30 GROUP BY user_id. For 30-day window per user: use date range in WHERE. If sessions span dates: COUNT(DISTINCT session_id) / 30. Or use date diff for actual active days. **Why it matters**: Design choices compound at scale—wrong approach can cause 100× overhead....
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