686 search results - page 19 / 138 » A query simulation system to illustrate database query execu... |
WSMAI
2004
13 years 11 months ago
2004
Continuous Queries (CQ) help users to retrieve results as soon as they become available. The CQ keeps track of two important events. If there is any change in the source informatio...
VLDB
1993
ACM
14 years 2 months ago
1993
ACM
III this paper we address the problem of controlling the execution of a query optimizer. We describe a control for the optimization process that is based on planning. The controll...
SIGMOD
2007
ACM
14 years 10 months ago
2007
ACM
Accurate cardinality estimation is critically important to high-quality query optimization. It is well known that conventional cardinality estimation based on histograms or simila...
ICDE
2001
IEEE
14 years 11 months ago
2001
IEEE
LeSelect is a mediator system which allows scientists to publish their resources (data and programs) so they can be transparently accessed. The scientists can typically issue quer...
ICDE
2000
IEEE
14 years 2 months ago
2000
IEEE
Increasing application demands are pushing database management systems (DBMSs) towards providing adequate and efficient support for content-based retrieval over multimedia objects...