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Abstract
A Short Note on Data Warehouse
Riddhi Vora* and Sutariya Neha
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 who states that “a data warehouse is a subject-oriented, integrated, time-variant and nonvolatile 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 integrated property 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.
Published Date: 2024-08-29; Received Date: 2020-10-06