503 search results - page 32 / 101 » Applying Multiple Query Optimization in Mobile Databases |
124
click to vote
TEAA
2005
Springer
15 years 8 months ago
2005
Springer
Abstract. In emerging database applications that deal with large sets of multidimensional data, the performance of the query system significantly depends on the performance of its ...
121
click to vote
ADBIS
2005
Springer
15 years 8 months ago
2005
Springer
Abstract. The performance of an information retrieval system is usually measured in terms of two different criteria, precision and recall. This way, the optimization of any of its...
201
click to vote
ICDE
2001
IEEE
16 years 3 months ago
2001
IEEE
We describe efficient algorithms for accurately estimating the number of matches of a small node-labeled tree, i.e., a twig, in a large node-labeled tree, using a summary data str...
149
click to vote
DBPL
2001
Springer
15 years 7 months ago
2001
Springer
Abstract. We are interested in the theoretical foundations of the optimization of conjunctive regular path queries (CRPQs). The basic problem here is deciding query containment bot...
130
click to vote
VLDB
2005
ACM
15 years 8 months ago
2005
ACM
Nested iteration is an important technique for query evaluation. It is the default way of executing nested subqueries in SQL. Although decorrelation often results in cheaper non-n...