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Calculate the average session duration per user for the Expedia website.

General/Othereasy0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Expedia
Interview Pro Tip

Pro-Move: 'We exclude sessions with 1 event and cap at 24hr—bots and errors skewed our early metrics.' Red Flag: Not defining session—need session_id or timeout logic.

Key Concepts Tested
sql
Expert AnswerPremium
45 wordsInterview-ready
**SQL**: SELECT user_id, AVG(duration) AS avg_session_duration FROM (SELECT user_id, session_id, MAX(ts) - MIN(ts) AS duration FROM events GROUP BY user_id, session_id) t GROUP BY user_id. **Logic**: Inner query computes per-session duration; outer averages per user....
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