483 search results - page 39 / 97 » Evaluating Top-k Selection Queries |
DEXA
2005
Springer
14 years 1 months ago
2005
Springer
Bitmap indices are efficient data structures for processing complex, multi-dimensional queries in data warehouse applications and scientific data analysis. For high-cardinality at...
SIGMOD
1996
ACM
13 years 11 months ago
1996
ACM
The constructionof high-performance databasesystems that combine the best aspects of the relational and object-oriented approaches requires the design of client-server architectur...
VLDB
2004
ACM
14 years 1 months ago
2004
ACM
This paper presents a novel and complementary technique to optimize an XPath query by minimizing its wildcard steps. Our approach is based on using a general composite axis called...
WWW
2007
ACM
14 years 8 months ago
2007
ACM
We present a method for acquiring ontological knowledge using search query logs. We first use query logs to identify important contexts associated with terms belonging to a semant...
SSD
2005
Springer
14 years 1 months ago
2005
Springer
We study the problem of answering spatial queries in databases where objects exist with some uncertainty and they are associated with an existential probability. The goal of a thre...