1654 search results - page 155 / 331 » Ontology Based Query Processing in Database Management Syste... |
145
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SIGMOD
2010
ACM
15 years 8 months ago
2010
ACM
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...
153
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DEXAW
2006
IEEE
15 years 10 months ago
2006
IEEE
Network-based information systems use well-defined standards to ensure interoperability and also have a tightly coupled relationship between their internal data representation an...
152
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ICDE
2005
IEEE
15 years 9 months ago
2005
IEEE
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
169
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ER
2008
Springer
15 years 5 months ago
2008
Springer
Abstract Although most workflow management systems nowadays offer graphical editors for process modeling, the learning curve is still too steep for users who are unexperienced in p...
123
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SIGMOD
1998
ACM
15 years 8 months ago
1998
ACM
Remote data access from disparate sources across a widearea network such as the Internet is problematic due to the unpredictable nature of the communications medium and the lack o...