929 search results - page 42 / 186 » Answering imprecise database queries: a novel approach |
VLDB
2004
ACM
14 years 1 months ago
2004
ACM
We consider the problem of estimating set-expression cardinality in a distributed streaming environment where rapid update streams originating at remote sites are continually tran...
CIKM
2009
Springer
14 years 2 months ago
2009
Springer
Well-designed indices can dramatically improve query performance. Including query workload information can produce indices that yield better overall throughput while balancing the...
VLDB
2001
ACM
14 years 2 days ago
2001
ACM
Estimating the number of distinct values is a wellstudied problem, due to its frequent occurrence in queries and its importance in selecting good query plans. Previous work has sh...
EDBT
2008
ACM
14 years 7 months ago
2008
ACM
In the classical database world, information access has been based on a paradigm that involves structured, schema-aware, queries and tabular answers. In the current environment, h...
ICDE
2007
IEEE
14 years 9 months ago
2007
IEEE
We study the problem of answering queries posed on virtual views of XML documents, a problem commonly encountered when enforcing XML access control and integrating data. We approa...