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Optimize Slow Shipment Aggregation Query

Hard
SQL & Data Manipulationperformancequery optimizationAggregations

Problem

How would you optimize a slow-running SQL query that aggregates millions of rows of shipment data at McKesson?

Practicing as: Data Analyst interview at McKesson

Hi, I'll play your McKesson interviewer for the Data Analyst 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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