625 search results - page 86 / 125 » Genetic algorithms for large join query optimization |
CCGRID
2005
IEEE
14 years 1 months ago
2005
IEEE
Partial replication is one type of optimization to speed up execution of queries submitted to large datasets. In partial replication, a portion of the dataset is extracted, re-org...
DLOG
2006
13 years 9 months ago
2006
The novel context of accessing and querying large data repositories through ontologies that are formalized in terms of expressive DLs requires on the one hand to consider query an...
GECCO
2005
Springer
14 years 1 months ago
2005
Springer
We study if and when the inequality dp(H) ≤ rel∆(H) holds for schemas H in chromosomes that are structured as trees. The disruption probability dp(H) is the probability that a...
SDM
2003
SIAM
13 years 9 months ago
2003
SIAM
In earlier work we have introduced and explored a variety of different probabilistic models for the problem of answering selectivity queries posed to large sparse binary data set...
ICDE
2008
IEEE
14 years 2 months ago
2008
IEEE
— Skyline queries are capable of retrieving interesting points from a large data set according to multiple criteria. Most work on skyline queries so far has assumed a centralized...