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Encyclopedia of Database Systems pp 657–658Cite as

Data Warehouse

  • Reference work entry

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Synonyms

Information repository; DW

Definition

A data warehouse (DW) is an integrated repository of data put into a form that can be easily understood, interpreted, and analyzed by the people who need to use it to make decisions. The most widely cited definition of a DW is from Inmon [2] who states that “a data warehouse is a subject-oriented, integrated, nonvolatile, and time-variant collection of data in support of management’s decisions.”

The subject-oriented property means that the data in a DW are organized around major entities of interests of an organization. Examples of subjects are customers, products, sales, and vendors. This property allows users of a DW to analyze each subject in depth for tactical and strategic decision-making.

The integratedproperty means that the data in a DW are integrated not only from all operational database systems but also some meta-data and other related external data. When data are moved from operational databases to a DW, they are extracted,...

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Recommended Reading

  1. Chaudhuri S. and Dayal U. An overview of data warehousing and OLAP technology. ACM SIGMOD Rec., 26(1):65–74, 1997.

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  2. Inmon W.H. Building the Data Warehouse, 3rd edn. Wiley, New York, 2002.

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  3. Kimball R. and Ross M. The Data Warehouse Toolkit, 2nd edn. Wiley, New York, 2002.

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Author information

Authors and Affiliations

  1. Drexel University, Philadelphia, PA, USA

    Il-Yeol Song

Authors
  1. Il-Yeol Song
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Editor information

Editors and Affiliations

  1. College of Computing, Georgia Institute of Technology, 266 Ferst Drive, 30332-0765, Atlanta, GA, USA

    LING LIU (Professor) (Professor)

  2. Database Research Group David R. Cheriton School of Computer Science, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, ON, Canada

    M. TAMER ÖZSU (Professor and Director, University Research Chair) (Professor and Director, University Research Chair)

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© 2009 Springer Science+Business Media, LLC

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Song, IY. (2009). Data Warehouse. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_882

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