Problem
How would you design a SQL query to identify merchants whose transaction volume has declined for three consecutive months at Parafin?
Practicing as: Data Scientist interview at ParafinHi, I'll play your Parafin 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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