505 search results - page 22 / 101 » Queries with Incomplete Answers over Semistructured Data |
191
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ICDE
2008
IEEE
15 years 11 months ago
2008
IEEE
Abstract-- Cisco's NetFlow Collector (NFC) is a powerful example of a real-world product that supports multiple aggregate queries over a continuous stream of IP flow records. ...
108
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SIGMOD
2011
ACM
14 years 13 days ago
2011
ACM
An important means of allowing non-expert end-users to pose ad hoc queries — whether over single databases or data integration systems — is through keyword search. Given a set...
KSEM
2010
Springer
14 years 8 months ago
2010
Springer
In this paper, we consider the problem of query answering over large multimedia ontologies. Traditional reasoning systems may have problems to deal with large amounts of expressive...
158
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SIGMOD
2005
ACM
15 years 9 months ago
2005
ACM
Statistical estimation and approximate query processing have become increasingly prevalent applications for database systems. However, approximation is usually of little use witho...
170
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ICDE
2008
IEEE
15 years 11 months ago
2008
IEEE
Answering queries using materialized views has been well studied in the context of structured queries and has shown significant performance benefits. Despite the popularity of keyw...