796 search results - page 31 / 160 » A Formalization of ODMG Queries |
177
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SIGMOD
2006
ACM
15 years 12 months ago
2006
ACM
We study the problem of finding efficient equivalent viewbased rewritings of relational queries, focusing on query optimization using materialized views under the assumption that ...
105
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CIKM
2011
Springer
13 years 11 months ago
2011
Springer
In this paper, we reveal a common deficiency of the current retrieval models: the component of term frequency (TF) normalization by document length is not lower-bounded properly;...
IDEAS
2005
IEEE
15 years 5 months ago
2005
IEEE
The modern XML query language called XQuery includes advanced facilities both to query and to transform XML data. An XQuery query optimizer should be able to optimize any query. F...
151
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WEBDB
2010
Springer
15 years 3 months ago
2010
Springer
Data on the Web is increasingly being used for discovery and exploratory tasks. Unlike traditional fact-finding tasks that require only the typical single-query and response parad...
BNCOD
1997
15 years 1 months ago
1997
With the substantial change of declarative query languages from plain SQL to the so-called \object SQLs", in particular OQL, there has surprisingly been not much change in the...