4113 search results - page 429 / 823 » Watermarking Relational Databases |
186
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VLDB
1998
ACM
15 years 11 months ago
1998
ACM
Currently the key problems of query optimization are extensibility imposed by object-relational technology, as well as query complexity caused by forthcoming applications, such as...
182
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ICDT
1997
ACM
15 years 11 months ago
1997
ACM
The paper introduces a model of the Web as an in nite, semistructured set of objects. We reconsider the classical notions of genericity and computability of queries in this new con...
173
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ICDT
1997
ACM
15 years 11 months ago
1997
ACM
Abstract. The correctness of nested transactions for multidatabases differs from that of at transactions in that, for nested transactions the execution order of siblings at each re...
155
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VLDB
1997
ACM
15 years 11 months ago
1997
ACM
The result size of a query that involves multiple attributes from the same relation depends on these attributes’ joint data distribution,i.e., the frequencies of all combination...
178
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ICDE
1993
IEEE
15 years 11 months ago
1993
IEEE
The IsaLog model and language are presented. The model has complex objects with classes, relations, and isa hierarchies. The language is strongly typed and declarative. The main i...