Results 41 to 50 of about 25,500 (166)
Semantic query in a relational database using a local ontology construction (Retracted)
South African Journal of Science, 2012 Semantic Web refers to a Web of linked data in which data can be shared and reused, allowing more uses than the traditional 'Web of documents'. However, most of the information on the Web is stored in relational databases and such databases cannot be ...
Saeed Sedighi, Reza Javidan
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Heuristic program to design Relational Databases
Revista MENDIVE, 2009 The great development of today’s world determines that the world level of information increases day after day, however, the time allowed to transmit this information in the classrooms has not changed.
Manuel Pereira Rosa +1 more
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Adequacy of Decompositions of Relational Databases
Journal of Computer and System Sciences, 1980 AbstractWe consider conditions that have appeared in the literature with the purpose of defining a “good” decomposition of a relation scheme. We show that these notions are equivalent in the case that all constraints in the database are functional dependencies. This result solves an open problem of Rissanen.
David Maier 0001 +3 more
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Transforming Fuzzy Spatiotemporal Data From Relational Databases to XML
IEEE Access, 2018 On account of the poor shareability of fuzzy spatiotemporal data in Web while XML could contribute to information performance and information interaction flexibly, we study the methodology of modeling the fuzzy spatiotemporal data based on relational ...
Nan Li, Luyi Bai
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Communications of the ACM, 1982 It is well known that the growth in demands from end users for new applications is outstripping the capability of data processing departments to implement the corresponding application programs. There are two complementary approaches to attacking this problem (and both approaches are needed): one is to put end users into direct touch with the ...
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Factorisation in relational databases
, 2014 We study representation systems for relational data based on relational algebra expressions with unions, products, and singleton relations. Algebraic factorisation using the distributivity of product over union allows succinct representation of many-to-many relationships; further succinctness is brought by sharing repeated subexpressions.
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A comparison of approaches to accessing existing biological and chemical relational databases via SPARQL. [PDF]
J Cheminform, 2023 Galgonek J, Vondrášek J.
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On the Potential of Relational Databases for the Detection of Clusters of Infection and Antibiotic Resistance Patterns. [PDF]
Antibiotics (Basel), 2023 Gelfusa M +10 more
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Derivation of constraints and database relations
, 1996 In this paper we investigate which constraints may be derived from a given set of constraints. We show that, given a set of relations R, all of which are invariant under some set of permutations P, it is possible to derive any other relation which is invariant under P, using only the projection, Cartesian product, and selection operators, together with
David A. Cohen +2 more
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Towards Robust Fingerprinting of Relational Databases by Mitigating Correlation Attacks. [PDF]
IEEE Trans Dependable Secure Comput, 2023 Ji T, Ayday E, Yilmaz E, Li P.
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