2635 search results - page 436 / 527 » Algorithms for the Database Layout Problem |
230
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SIGMOD
2007
ACM
16 years 4 months ago
2007
ACM
Declarative data quality has been an active research topic. The fundamental principle behind a declarative approach to data quality is the use of declarative statements to realize...
345
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SIGMOD
2006
ACM
16 years 4 months ago
2006
ACM
Given a dataset P and a preference function f, a top-k query retrieves the k tuples in P with the highest scores according to f. Even though the problem is well-studied in convent...
148
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SIGMOD
2002
ACM
16 years 4 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...
150
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PODS
2007
ACM
16 years 4 months ago
2007
ACM
We consider the problem of optimizing and executing multiple continuous queries, where each query is a conjunction of filters and each filter may occur in multiple queries. When f...
140
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PODS
2008
ACM
16 years 4 months ago
2008
ACM
A schema mapping is a specification that describes how data from a source schema is to be mapped to a target schema. Once the data has been transferred from the source to the targ...