7576 search results - page 1250 / 1516 » On Querying Ontologies and Databases |
174
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SIGMOD
1999
ACM
15 years 11 months ago
1999
ACM
Pre-computation and materialization of views with aggregate functions is a common technique in Data Warehouses. Due to the complex structure of the warehouse and the different pro...
152
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VLDB
1998
ACM
15 years 11 months ago
1998
ACM
The problem of finding an optimal bipartition of a rectangle set has a direct impact on query performance of dynamic R-trees. During update operations, overflowed nodes need to be...
185
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EDBT
2009
ACM
15 years 10 months ago
2009
ACM
A skyline query returns a set of objects that are not dominated by other objects. An object is said to dominate another if it is closer to the query than the latter on all factors...
179
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CIDR
2003
15 years 8 months ago
2003
It has frequently been observed that most of the world’s data lies outside database systems. The reason is that database systems focus on structured data, leaving the unstructur...
140
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EFDBS
2001
15 years 8 months ago
2001
In this work, we consider augmenting SQL with constructs allowing dynamic restructuring. Dynamic restructuring occurs naturally in a framework including second-order capabilities f...