708 search results - page 5 / 142 » A Genetic Algorithm for Database Query Optimization |
ADBIS
1998
Springer
13 years 11 months ago
1998
Springer
In order to answer efficiently range queries in 2-d R-trees, first we sort queries by means of a space filling curve, then we group them together, and finally pass them for process...
ICDE
2002
IEEE
14 years 8 months ago
2002
IEEE
We study the problem of query optimization in federated relational database systems. The nature of federated databases explicitly decouples many aspects of the optimization proces...
DPD
2002
13 years 7 months ago
2002
A major cost in executing queries in a distributed database system is the data transfer cost incurred in transferring relations (fragments) accessed by a query from different sites...
ICDE
2007
IEEE
14 years 1 months ago
2007
IEEE
Microaggregation is a technique used to protect privacy in databases and location-based services. We propose a new hybrid technique for multivariate microaggregation. Our techniqu...
DEXA
2003
Springer
14 years 21 days ago
2003
Springer
Query optimizers in current database management systems (DBMS) often face problems such as intolerably long optimization time and/or poor optimization results when optimizing compl...