Problem
How would you write a SQL query using self-joins to compare user activity over time for Ancestry Marketing?
Practicing as: Data Scientist interview at Ancestry MarketingHi, I'll play your Ancestry Marketing 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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