2675 search results - page 387 / 535 » From Ontology to Relational Databases |
202
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PODS
1999
ACM
15 years 11 months ago
1999
ACM
We investigate the problem of how to extend constraint query languages with aggregate operators. We deal with standard relational aggregation, and also with aggregates speci c to ...
207
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BMCBI
2006
15 years 6 months ago
2006
Background: Mitochondria are sub-cellular organelles that have a central role in energy production and in other metabolic pathways of all eukaryotic respiring cells. In the last f...
221
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PVLDB
2011
14 years 9 months ago
2011
Adaptive indexing is characterized by the partial creation and refinement of the index as side effects of query execution. Dynamic or shifting workloads may benefit from prelimi...
177
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BTW
2009
Springer
15 years 11 months ago
2009
Springer
: Cost-based optimizers in relational databases make use of data statistics to estimate intermediate result cardinalities. Those cardinalities are needed to estimate access plan co...
210
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ISF
2008
15 years 6 months ago
2008
Abstract Many security problems are caused by vulnerabilities hidden in enterprise computer networks. It is very important for system administrators to have knowledge about the sec...