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CAS
2005
64views more  CAS 2005»
10 years 4 months ago
Estimating Null Values In Relational Database Systems Based On Genetic Algorithms
In this paper, we present a new method to estimate null values in relational database systems based on genetic algorithms. It can tune the membership functions of the linguistic v...
Shyi-Ming Chen, Shih-Wei Lee
WM
2003
10 years 5 months ago
Integration with Ontologies
: One of today’s hottest IT topics is integration, as bringing together information from different sources and structures is not completely solved. The approach outlined here wan...
Andreas Maier, Jessica Aguado, Amaia Bernaras, I&n...
GVD
2003
151views Database» more  GVD 2003»
10 years 5 months ago
Bridging the GAP Between Relational and Native XML Storage with Staircase Join
Several mapping schemes have recently been proposed to store XML data in relational tables. Relational database systems are readily available and can handle vast amounts of data v...
Jens Teubner, Torsten Grust, Maurice van Keulen
CIKM
2008
Springer
10 years 6 months ago
A SQL database system for solving constraints
This demonstration presents the concepts, design, and implementation of SCDE, a relational database systems extended with the ability to solve constraint satisfaction problems (CS...
Sebastien Siva, Lesi Wang
VLDB
2000
ACM
136views Database» more  VLDB 2000»
10 years 7 months ago
Managing Intervals Efficiently in Object-Relational Databases
Modern database applications show a growing demand for efficient and dynamic management of intervals, particularly for temporal and spatial data or for constraint handling. Common...
Hans-Peter Kriegel, Marco Pötke, Thomas Seidl
DEXAW
2007
IEEE
128views Database» more  DEXAW 2007»
10 years 8 months ago
Sharing Data on the Grid using Ontologies and distributed SPARQL Queries
The vision of the Semantic Web is to make Web content machine-readable. To describe data, the Resource Description Framework has been extended with a schema-level and description ...
Andreas Langegger, Martin Blöchl, Wolfram W&o...
BTW
2007
Springer
133views Database» more  BTW 2007»
10 years 8 months ago
Pathfinder: XQuery Compila-tion Techniques for Relational Database Targets
: Relational database systems are highly efficient hosts to table-shaped data. It is all the more interesting to see how a careful inspection of both, the XML tree structure as wel...
Jens Teubner
VLDB
1994
ACM
114views Database» more  VLDB 1994»
10 years 8 months ago
Including Group-By in Query Optimization
In existing relational database systems, processing of group-by and computation of aggregate functions are always postponed until all joins are performed. In this paper, we presen...
Surajit Chaudhuri, Kyuseok Shim
DBPL
1997
Springer
87views Database» more  DBPL 1997»
10 years 8 months ago
Incremental Recomputation of Recursive Queries with Nested Sets and Aggregate Functions
We examine the power of incremental evaluation systems that use an SQL-like language for maintaining recursively-de ned views. We show that recursive queries such as transitive clo...
Leonid Libkin, Limsoon Wong
CLUSTER
2002
IEEE
10 years 9 months ago
Cluster Based Hybrid Hash Join: Analysis and Evaluation
The join is the most important, but also the most time consuming operation in relational database systems. We implemented the parallel Hybrid Hash Join algorithm on a PC-cluster a...
Erich Schikuta, Peter Kirkovits
books