Problem
Explain how you would use SQL window functions to calculate rolling 7-day retention by cohort.
Practicing as: Data Scientist interview at Nyc StaffingHi, I'll play your Nyc Staffing 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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