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What is Data Warehouse?

+4 votes
What is Data Warehouse?
posted Jun 25, 2013 by Shatark Bajpai

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1 Answer

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A data warehouse is subject-oriented, integrated, time-variant and non-volatile [data] collection in support of management decision making processes.
• Subject-oriented: all relevant data concerning a subject is gathered and stored in a single database.
• Integrated: all data in the warehouse must be compatible with each other regardless of type or location.
• Time-variant: all data contains a reference to time so that the age of each piece of data can be determined.
• Non-volatile: the data does not change once it has been collected.

answer Jun 25, 2013 by anonymous