Problem
How would you design a SQL window function query to calculate rolling 7-day engagement and compare it across user cohorts?
Practicing as: Data Scientist interview at SuperhumanHi, I'll play your Superhuman interviewer for the Data Scientist role. Candidates describe these interviews as mostly positive and moderately difficult, so expect me to be friendly and conversational. Take your time with the question above and answer like we're in the room.
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