316 search results - page 15 / 64 » Evaluation of Conditional Preference Queries |
ICDT
2005
ACM
14 years 3 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...
BMCBI
2010
13 years 5 months ago
2010
Background: Concomitant with the rise in the popularity of DNA microarrays has been a surge of proposed methods for the analysis of microarray data. Fully controlled "spike-i...
CIKM
2007
Springer
14 years 4 months ago
2007
Springer
XML query languages typically allow the specification of structural patterns of elements. Finding the occurrences of such patterns in an XML tree is the key operation in XML quer...
DEXAW
1998
IEEE
14 years 2 months ago
1998
IEEE
Materialized views offer opportunities for significant performance gain in query evaluation by providing fast access to pre-computed data. The question of when and how to use a ma...
ICDE
1996
IEEE
14 years 11 months ago
1996
IEEE
This paper presents a difference calculus for determining changes to rule conditions in an active DBMS. The calculus has been used for implementing an algorithm to efficiently mon...