995 search results - page 149 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
159
Voted
EDBT
2010
ACM
16 years 1 months ago
2010
ACM
A recurring manual task in data integration, ontology alignment or model management is finding mappings between complex meta data structures. In order to reduce the manual effor...
159
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EDBT
2010
ACM
16 years 1 months ago
2010
ACM
Implementations of map-reduce are being used to perform many operations on very large data. We examine strategies for joining several relations in the map-reduce environment. Our ...
188
Voted
SIGMOD
2002
ACM
16 years 6 months ago
2002
ACM
This paper addresses the problem of evaluating ranked top-? queries with expensive predicates. As major DBMSs now all support expensive user-defined predicates for Boolean queries...
201
Voted
VLDB
2004
ACM
16 years 2 days ago
2004
ACM
In data stream applications, data arrive continuously and can only be scanned once as the query processor has very limited memory (relative to the size of the stream) to work with...
174
Voted
VLDB
1995
ACM
15 years 10 months ago
1995
ACM
New demandsare put on query processing in Object-Oriented(00) databasesto provide efficient andrelationally completequery languages. A flexible 00 data model requires overloading ...