208 search results - page 5 / 42 » Efficient Computation of Multiple Group By Queries |
100
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WWW
2008
ACM
15 years 10 months ago
2008
ACM
Efficiently querying RDF [1] data is being an important factor in applying Semantic Web technologies to real-world applications. In this context, many efforts have been made to st...
91
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PVLDB
2010
14 years 4 months ago
2010
Skyline queries have gained considerable attention for multicriteria analysis of large-scale datasets. However, the skyline queries are known to return too many results for highdi...
SIROCCO
2000
14 years 11 months ago
2000
ABSTRACT: This work considers the problem of performing a set of N tasks on a set of P cooperating message-passing processors (P N). The processors use a group communication servi...
166
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SIGMOD
2007
ACM
15 years 9 months ago
2007
ACM
Complex queries often contain common or similar subexpressions, either within a single query or among multiple queries submitted as a batch. If so, query execution time can be imp...
DKE
2008
14 years 9 months ago
2008
We study an important data analysis operator, which extracts the k most important groups from data (i.e., the k groups with the highest aggregate values). In a data warehousing co...