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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Managing and Querying Versions of Multiversion Data Warehouse
verfasst von : Robert Wrembel, Tadeusz Morzy
Erschienen in: Advances in Database Technology - EDBT 2006
Verlag: Springer Berlin Heidelberg
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A data warehouse (DW) is a database that integrates external data sources (EDSs) for the purpose of advanced data analysis. The methods of designing a DW usually assume that a DW has a static schema and structures of dimensions. In practice, schema and dimensions’ structures often change as the result of the evolution of EDSs, changes of the real world represented in a DW, new user requirements, new versions of software being installed, and system tuning activities. Examples of various change scenarios can be found in [1,8].