294 search results - page 44 / 59 » Approximate query processing using wavelets |
ICDE
2009
IEEE
14 years 9 months ago
2009
IEEE
A common approach to performing keyword search over relational databases is to find the minimum Steiner trees in database graphs. These methods, however, are rather expensive as th...
VLDB
2007
ACM
14 years 1 months ago
2007
ACM
Intuitively, aggressive work sharing among concurrent queries in a database system should always improve performance by eliminating redundant computation or data accesses. We show...
CIKM
2003
Springer
14 years 28 days ago
2003
Springer
Searchers can have problems devising queries that accurately express their, often dynamic, information needs. In this paper we describe an adaptive approach that uses unobtrusive ...
ICDT
2005
ACM
14 years 1 months ago
2005
ACM
Abstract. A classical problem in query optimization is to find the optimal ordering of a set of possibly correlated selections. We provide an ion of this problem as a generalizati...
GIS
2006
ACM
14 years 8 months ago
2006
ACM
Efficient evaluation of spatial queries is an important issue in spatial database. Among spatial operations, spatial join is very useful, intersection being the most common predic...