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» A Model of Queries for Object-Oriented Databases
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NAR
2011
330views Computer Vision» more  NAR 2011»
14 years 11 months ago
Hymenoptera Genome Database: integrated community resources for insect species of the order Hymenoptera
The Hymenoptera Genome Database (HGD) is a comprehensive model organism database that caters to the needs of scientists working on insect species of the order Hymenoptera. This sy...
Monica C. Munoz-Torres, Justin T. Reese, Christoph...
VLDB
2008
ACM
148views Database» more  VLDB 2008»
16 years 4 months ago
Purpose based access control for privacy protection in relational database systems
Abstract In this article, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated wit...
Ji-Won Byun, Ninghui Li
SIGMOD
1993
ACM
150views Database» more  SIGMOD 1993»
15 years 8 months ago
Predicate Migration: Optimizing Queries with Expensive Predicates
The traditional focus of relational query optimization schemes has been on the choice of join methods and join orders. Restrictions have typically been handled in query optimizers ...
Joseph M. Hellerstein, Michael Stonebraker
SIGMOD
2007
ACM
181views Database» more  SIGMOD 2007»
16 years 4 months ago
Progressive and selective merge: computing top-k with ad-hoc ranking functions
The family of threshold algorithm (i.e., TA) has been widely studied for efficiently computing top-k queries. TA uses a sort-merge framework that assumes data lists are pre-sorted...
Dong Xin, Jiawei Han, Kevin Chen-Chuan Chang
ADBIS
2003
Springer
204views Database» more  ADBIS 2003»
15 years 8 months ago
Hierarchical Bitmap Index: An Efficient and Scalable Indexing Technique for Set-Valued Attributes
Abstract. Set-valued attributes are convenient to model complex objects occurring in the real world. Currently available database systems support the storage of set-valued attribut...
Mikolaj Morzy, Tadeusz Morzy, Alexandros Nanopoulo...