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DOLAP
2000
ACM
14 years 1 months ago
Comparing Nested GPSJ Queries in Multidimensional Databases
A multidimensional database can be seen as a collection of multidimensional cubes, from which information is usually extracted by aggregation; aggregated data can be calculated ei...
Matteo Golfarelli, Stefano Rizzi
IJCAI
2003
13 years 10 months ago
Describing and Utilizing Constraints to Answer Queries in Data-Integration Systems
In data-integration systems, information sources often have various constraints such as “all houses stored at a source have a unique address.” These constraints are very usefu...
Chen Li
SEMWEB
2005
Springer
14 years 2 months ago
Benchmarking Database Representations of RDF/S Stores
Abstract. In this paper we benchmark three popular database representations of RDF/S schemata and data: (a) a schema-aware (i.e., one table per RDF/S class or property) with explic...
Yannis Theoharis, Vassilis Christophides, Gregory ...
ACMSE
2007
ACM
14 years 19 days ago
Hierarchical land cover information retrieval in object-oriented remote sensing image databases with native queries
Classification and change detection of land cover types in the remotely sensed images is one of the major applications in remote sensing. This paper presents a hierarchical framew...
Jiang Li
SIGMOD
1992
ACM
160views Database» more  SIGMOD 1992»
14 years 21 days ago
Extensible/Rule Based Query Rewrite Optimization in Starburst
This paper describes the Query Rewrite facility of the Starburst extensible database system, a novel phase of query optimization. We present a suite of rewrite rules used in Starb...
Hamid Pirahesh, Joseph M. Hellerstein, Waqar Hasan