829 search results - page 59 / 166 » Location-aware Query Processing and Optimization |
SIGMOD
2006
ACM
14 years 9 months ago
2006
ACM
This paper presents a principled framework for efficient processing of ad-hoc top-k (ranking) aggregate queries, which provide the k groups with the highest aggregates as results....
SIGMOD
2006
ACM
14 years 9 months ago
2006
ACM
Text is ubiquitous and, not surprisingly, many important applications rely on textual data for a variety of tasks. As a notable example, information extraction applications derive...
SIGMOD
2012
ACM
12 years 2 days ago
2012
ACM
Query substitution is an important problem in information retrieval. Much work focuses on how to find substitutes for any given query. In this paper, we study how to efficiently ...
CIKM
2006
Springer
14 years 1 months ago
2006
Springer
In an uncertain database, each data item is modeled as a range associated with a probability density function. Previous works for this kind of data have focussed on simple queries...
CIKM
2004
Springer
14 years 1 months ago
2004
Springer
With the growing importance of semi-structure data in information exchange, much research has been done to provide an effective mechanism to match a twig query in an XML database....