Problem
Given a table of user transactions, write a query to identify repeat buyers who made a purchase within 30 days of their initial sign-up.
Practicing as: Business Analyst interview at eBayHi, I'll play your eBay interviewer for the Business Analyst role. Candidates describe these interviews as mixed and moderately difficult, so expect me to be professional and fair. Take your time with the question above and answer like we're in the room.
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