418 search results - page 15 / 84 » Optimizing Large Join Queries in Mediation Systems |
SIGMOD
1993
ACM
13 years 11 months ago
1993
ACM
The traditional focus of relational query optimization schemes has been on the choice of join methods and join orders. Restrictions have typically been handled in query optimizers ...
PODS
2008
ACM
14 years 7 months ago
2008
ACM
In the rank join problem, we are given a set of relations and a scoring function, and the goal is to return the join results with the top K scores. It is often the case in practic...
DMSN
2008
ACM
13 years 9 months ago
2008
ACM
With the ultimate goal of extending the data integration paradigm and query processing capabilities to ad hoc wireless networks, sensors, and stream systems, we consider how to su...
DBVIS
1993
13 years 11 months ago
1993
In this paper, we present ideas how visualization technology can be used to improve the difficult process of querying very large databases. With our VisDB system, we try to provid...
EDBT
2004
ACM
14 years 7 months ago
2004
ACM
The join operation, which combines tuples from multiple relations, is the most fundamental and, typically, the most expensive operation in database queries. The standard approach t...