168 search results - page 5 / 34 » Efficient Creation of Statistics over Query Expressions |
ICDE
2004
IEEE
14 years 8 months ago
2004
IEEE
Twig queries represent the building blocks of declarative query languages over XML data. A twig query describes a complex traversal of the document graph and generates a set of el...
ICDE
2006
IEEE
14 years 8 months ago
2006
IEEE
Aggregate monitoring over data streams is attracting more and more attention in research community due to its broad potential applications. Existing methods suffer two problems, 1...
SIGMOD
2010
ACM
13 years 7 months ago
2010
ACM
Automated extraction of structured data from Web sources often leads to large heterogeneous knowledge bases (KB), with data and schema items numbering in the hundreds of thousands...
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Voted
ICDE
2009
IEEE
14 years 8 months ago
2009
IEEE
Many location-based services require rich and expressive query language support for filtering large amounts of information. In prominent location-based services thousands of conti...
ISMIS
1999
Springer
13 years 11 months ago
1999
Springer
Semantic Query Optimisation makes use of the semantic knowledge of a database (rules) to perform query transformation. Rules are normally learned from former queries fired by the u...