Results 311 to 320 of about 2,474,073 (348)
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A Virtual XML Database Engine for Relational Databases
2003While XML is emerging as the universal format for publishing and exchanging data on the Web, most business data is still stored and maintained in relational DBMSs. To enable eBusiness database applications, Web access to the legacy data managed by DBMSs needs to be provided.
Minyi Guo +3 more
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Object databases as generalizations of relational databases
Computer Standards & Interfaces, 1991Abstract One attractive approach to object databases is to see them as potentially an evolutionary development from relational databases. This paper concentrates on substantiating the technical basis for this claim, and illustrates it in some detail with an upwards-compatible extension of ANSI SQL2 for conventional objects.
David Beech, Ç. Özbütün
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Equivalence of relational database schemes
Proceedings of the eleventh annual ACM symposium on Theory of computing - STOC '79, 1979We investigate the question of when two database schemes embody the same information. We argue that this question reduces to the equivalence of the sets of fixed points of the project-join mappings associated with the two database schemes in question.
Jeffrey D. Ullman +3 more
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Answering queries in relational databases
ACM SIGMOD Record, 1983This paper concerns query answering in relational databases. We assume a universe U of attributes and a set of values associated with each attribute. A database scheme is a given collection R = {1, 2, ..., n} of subsets of U, called relation schemes. A query in R is any subset of U. We call "context" any joinable subset of R.
D'ATRI, ALESSANDRO +2 more
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On directly mapping relational databases to RDF and OWL
The Web Conference, 2012Mapping relational databases to RDF is a fundamental problem for the development of the Semantic Web. We present a solution, inspired by draft methods defined by the W3C where relational databases are directly mapped to RDF and OWL.
Juan Sequeda +2 more
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Assumptions in relational database theory
Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems - PODS '82, 1982Many results in relational database theory on the structure of dependencies, query languages, and databases in general have now been established. However, neither (a) the reliance of these results on various assumptions, nor (b) the desirability or reasonableness of these assumptions themselves have been closely examined.
ATZENI, Paolo, PARKER DS
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FDB: A Query Engine for Factorised Relational Databases
Proceedings of the VLDB Endowment, 2012Factorised databases are relational databases that use compact factorised representations at the physical layer to reduce data redundancy and boost query performance. This paper introduces FDB, an in-memory query engine for select-project-join queries
Nurzhan Bakibayev +2 more
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Understand Relational Databases
2019Understanding the history and theory behind relational databases helps us make sense of things and avoid common traps. But there are also many times when we need to ignore the theory and build practical solutions. This book assumes you are already familiar with relational databases and SQL; the information provided here is not merely introductory, it ...
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Fingerprinting relational databases
Proceedings of the 2006 ACM symposium on Applied computing, 2006In this paper, we propose a fingerprinting solution to protect valuable numeric relational data from illegal duplications and redistributions. We introduce a twice-embedding scheme. In the first embedding process, we embed a unique fingerprint to identify each recipient to whom the relational data is distributed.
Deyi Li, Jianmin Wang, Fei Guo
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