Problem
Write a SQL query to analyze monthly operational performance by region, joining orders and service tables to calculate completion rate, average turnaround time, and top-performing regions.
Practicing as: Operations Manager interview at TCSHi, I'll play your TCS interviewer for the Operations Manager 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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