What is Data Warehousing?
A data warehouse is the main repository of an organization's historical data, its corporate memory.
It contains the raw material for management's decision support system. The critical factor leading to the use of a data warehouse is that a data analyst can perform complex queries and analysis, such as data mining, on the information without slowing down the operational systems (Ref:Wikipedia).
Data warehousing collection of data designed to support management decision making.
Data warehouses contain a wide variety of data that present a coherent picture of business conditions at a single point in time.
It is a repository of integrated information, available for queries and analysis.
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