151 search results - page 15 / 31 » Materializing views with minimal size to answer queries |
116
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JACM
2008
14 years 11 months ago
2008
XML queries are usually expressed by means of XPath expressions identifying portions of the selected documents. An XPath expression defines a way of navigating an XML tree and ret...
196
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ICDE
1997
IEEE
16 years 1 months ago
1997
IEEE
Data warehouses collect copies of information from remote sources into a single database. Since the remote data is cached at the warehouse, it appears as local relations to the us...
164
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VLDB
2002
ACM
15 years 12 months ago
2002
ACM
We are interested in de ning and querying views in a huge and highly heterogeneous XML repository Web scale. In this context, view de nitions are very large and there is no appare...
106
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DAWAK
2009
Springer
15 years 3 months ago
2009
Springer
Skyline queries have gained much attention as alternative query semantics with pros (e.g.low query formulation overhead) and cons (e.g.large control over result size). To overcome ...
VLDB
1999
ACM
15 years 3 months ago
1999
ACM
We present an optimization method and algorithm designed for three objectives: physical data independence, semantic optimization, and generalized tableau minimization. The method ...