6846 search results - page 298 / 1370 » Querying a summary of database |
150
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VLDB
1997
ACM
15 years 10 months ago
1997
ACM
In recentyears,databaseresearchandproduct developmentactivities havefocusedonsupport for non-traditional data types, such astext or multi-media documents.This paper describes an a...
188
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WSDM
2009
ACM
16 years 1 months ago
2009
ACM
A lot of the world’s knowledge is stored in books, which, as a result of recent mass-digitisation efforts, are increasingly available online. Search engines, such as Google Book...
279
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GIS
2003
ACM
16 years 7 months ago
2003
ACM
With wireless communications and geo-positioning being widely available, it becomes possible to offer new e-services that provide mobile users with information about other mobile ...
330
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GIS
2005
ACM
16 years 7 months ago
2005
ACM
Recent advances in low-power sensing devices coupled with the widespread availability of wireless ad-hoc networks have fueled the development of sensor networks. These are typical...
267
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ICDT
2009
ACM
16 years 7 months ago
2009
ACM
We study containment and equivalence of (unions of) conjunctive queries on relations annotated with elements of a commutative semiring. Such relations and the semantics of positiv...