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Optimizing Slow Queries on Large Data

Hard
SQL & Data ManipulationPerformance Tuningindexessql

Problem

How do you optimize a slow-running query when dealing with large-scale transaction datasets?

Practicing as: Data Analyst interview at Walgreens

Hi, I'll play your Walgreens interviewer for the Data Analyst role. Candidates describe these interviews as mostly positive and on the easier side, 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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