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    Integrating star and snowflake schemas in data warehouses

    Garani, G. and Helmer, Sven (2012) Integrating star and snowflake schemas in data warehouses. International Journal of Data Warehousing and Mining 8 (4), pp. 22-40. ISSN 1548-3924.

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    Abstract

    A fundamental issue encountered by the research community of data warehouses (DWs) is the modeling of data. In this paper, a new design is proposed, named the starnest schema, for the logical modeling of DWs. Using nested methodology, data semantics can be explicitly represented. Part of the design involves providing a translation mechanism from the star/snowflake schemas to a nested representation. The novel schema proposed in this paper is accomplished by converting the fact-dimension schema to a fact-nested dimension schema. The transformation of the denormalized dimension tables to nested dimension tables increases the efficiency of query execution by reducing the number of tuples accessed for query retrieval since dimensional attributes can be used directly in the Group-by clause. In order to facilitate the implementation of the proposed approach, specific algorithms are built based on the starnest schema.

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Business, Economics & Informatics > Computer Science and Information Systems
    Depositing User: Sarah Hall
    Date Deposited: 24 May 2013 08:06
    Last Modified: 11 Oct 2016 15:26
    URI: http://eprints.bbk.ac.uk/id/eprint/6995

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