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What is Data Warehousing for Decision Support about?

1) Data warehousing involves consolidating data from multiple sources into a single large repository to support analysis and decision making. It uses OLAP for complex queries and mining of historical data trends. 2) A data warehouse integrates data from different operational databases, keeps relevant historical data, and aggregates data at a higher level than transaction systems. It supports OLAP queries and data mining. 3) OLAP allows multidimensional analysis of data through aggregation, drill-down, pivo

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