995 search results - page 51 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
109
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PODS
2006
ACM
16 years 2 months ago
2006
ACM
Privacy-preserving query-answering systems answer queries while provably guaranteeing that sensitive information is kept secret. One very attractive notion of privacy is perfect p...
119
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BTW
2003
Springer
15 years 7 months ago
2003
Springer
Abstract: In order to achieve efficient execution plans for queries comprising userdefined data types and predicates, the database system has to be provided with appropriate index ...
127
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VLDB
1998
ACM
15 years 6 months ago
1998
ACM
We propose a multi-dimensional language called nD-SQL with the following features: (i) nD-SQL supports queries that interoperate amongst multiple relational sources with heterogen...
113
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DASFAA
1999
IEEE
15 years 6 months ago
1999
IEEE
The spatial query has been processed in two steps, the filter step and the refinement step, due to a large volume and high complexity of the spatial data. However, this approach h...
210
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ICDE
2008
IEEE
16 years 3 months ago
2008
IEEE
Aggregate measures summarizing subsets of data are valuable in exploratory analysis and decision support, especially when dependent aggregations can be easily specified and compute...