Problem
Given a table of user transactions, construct a query to calculate the month-over-month retention rate of active buyers at Alibaba Group.
Practicing as: Data Analyst interview at Alibaba GroupHi, I'll play your Alibaba Group interviewer for the Data Analyst 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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