English  |  正體中文  |  简体中文  |  Post-Print筆數 : 27 |  Items with full text/Total items : 95906/126496 (76%)
Visitors : 31666105      Online Users : 452
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    政大機構典藏 > 理學院 > 資訊科學系 > 期刊論文 >  Item 140.119/69128
    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/69128

    Title: A Methodology for Schema Integration Using Concept Hierarchies
    Authors: 陳良弼
    Tsai,Pauray S. M.;Chen,Arbee L. P.
    Contributors: 資科系
    Date: 1999
    Issue Date: 2014-08-21 14:47:53 (UTC+8)
    Abstract: Since relational DBMSs are wide-spread, providing a relational global view for users who are only familiar with the relational model to access data in a multidatabase system is significant. However, the prior work on schema integration can not efficiently capture the relationships among relations from different databases. In this paper, we propose an approach to integrate database schemas into a relational global view which consists of concept hierarchies. A concept hierarchy is composed of relation schemes with the same concept, in which specialization and generalization can be specified to enrich the semantics of the relational view. Based on the concept hierarchies, a procedure is designed to decompose a global query to local subqueries and a set of transformation rules is developed to transform a query into an equivalent one for query optimization.
    Relation: Integrated Computer-Aided Engineering (EI),6(3),233-248
    Data Type: article
    Appears in Collections:[資訊科學系] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in 政大典藏 are protected by copyright, with all rights reserved.

    社群 sharing

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback