6846 search results - page 239 / 1370 » Querying a summary of database |
174
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ADBIS
2009
Springer
16 years 1 months ago
2009
Springer
Abstract. We consider the problem of query containment for conjunctive queries with the safe negation property. Some necessary conditions for this problem are given. A part of the ...
335
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ICDE
2009
IEEE
16 years 8 months ago
2009
IEEE
Due to the complexity of XML query languages, the need for visual query interfaces that can reduce the burden of query formulation is fundamental to the spreading of XML to wider c...
203
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DEXA
2008
Springer
15 years 8 months ago
2008
Springer
Query recommendation suggests related queries for search engine users when they are not satisfied with the results of an initial input query, thus assisting users in improving sear...
184
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ICDE
1997
IEEE
15 years 10 months ago
1997
IEEE
In this paper we propose a data model for representing moving objects in database systems. It is called the Moving Objects Spatio-Temporal (MOST) data model. We also propose Futur...
181
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SIGMOD
2002
ACM
16 years 6 months ago
2002
ACM
QURSED enables the development of web-based query forms and reports (QFRs) that query and report semistructured XML data, i.e., data that are characterized by nesting, irregularit...