Problem
Write a SQL query using window functions to rank customers by revenue within each region and return the top 3 per region.
Practicing as: Data Scientist interview at Kpmg UsHi, I'll play your Kpmg Us 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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