32 search results - page 1 / 7 » Learning-Based Top-N Selection Query Evaluation over Relatio... |
WAIM
2004
Springer
13 years 10 months ago
2004
Springer
A top-N selection query against a relation is to find the N tuples that satisfy the query condition the best but not necessarily completely. In this paper, we propose a new method ...
DKE
2008
13 years 4 months ago
2008
In many database applications, there are opportunities for multiple top-N queries to be evaluated at the same time. Often it is more cost effective to evaluate multiple such queri...
TODS
2002
13 years 4 months ago
2002
ICDT
2007
ACM
13 years 11 months ago
2007
ACM
Abstract. We study containment of conjunctive queries that are evaluated over databases that may contain tuples with null values. We assume the semantics of SQL for single block qu...
SIGMOD
2002
ACM
14 years 5 months ago
2002
ACM
We present a continuously adaptive, continuous query (CACQ) implementation based on the eddy query processing framework. We show that our design provides significant performance b...