A data warehouse is a centralized repository that stores integrated data from multiple sources, specifically designed for analysis and reporting. It supports business intelligence activities by allowing organizations to perform complex queries and analyze historical data. Unlike transactional databases that handle day-to-day operations, or data lakes that store raw, unprocessed data, a data warehouse contains structured data optimized for fast query performance.
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What is the primary difference between a data warehouse and a data lake?
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Why is integration of data from multiple sources an important feature of a data warehouse?
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How does a data warehouse optimize query performance for analysis?