On Functional Dependencies in Advanced Data Models
نویسندگان
چکیده
منابع مشابه
Data Analysis Based on Functional Dependencies
We present a novel approach to the design of schemas appropriate for data analysis; we call such schemas “analysis contexts”. Roughly speaking, an analysis context is a set of paths with common origin, in which the nodes are attributes and the edges are functional dependencies. Our main contributions are (a) an algorithm for generating all analysis contexts embodied in a set of attributes and a...
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The recent literature has provided a solid theoretical foundation for the use of schema mappings in data-exchange applications. Following this formalization, new algorithms have been developed to generate optimal solutions for mapping scenarios in a highly scalable way, by relying on SQL. However, these algorithms suffer from a serious drawback: they are not able to handle key constraints and f...
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ژورنال
عنوان ژورنال: Electronic Notes in Theoretical Computer Science
سال: 2003
ISSN: 1571-0661
DOI: 10.1016/s1571-0661(04)80849-1