Problem
Given a relational schema containing patient transaction records and provider registries, write a SQL query to calculate the rolling 30-day average of transactions per provider.
Practicing as: Data Engineer interview at DatavantHi, I'll play your Datavant interviewer for the Data Engineer 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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