995 search results - page 142 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
175
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FQAS
2004
Springer
15 years 9 months ago
2004
Springer
In the context of relational as well as deductive databases, correct and efficient integrity checking is a crucial issue, as, without any guarantee of data consistency, the answers...
144
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SIGMOD
1996
ACM
15 years 10 months ago
1996
ACM
Scheduling query execution plans is an important component of query optimization in parallel database systems. The problem is particularly complex in a shared-nothing execution en...
168
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ICDE
2010
IEEE
15 years 8 months ago
2010
IEEE
HECATAEUS is an open-source software tool for enabling impact prediction, what-if analysis, and regulation of relational database schema evolution. We follow a graph theoretic appr...
272
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SIGMOD
2008
ACM
16 years 6 months ago
2008
ACM
To deal with data uncertainty, existing probabilistic database systems augment tuples with attribute-level or tuple-level probability values, which are loaded into the database al...
155
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XSYM
2004
Springer
15 years 11 months ago
2004
Springer
A key step in the optimization of declarative queries over XML data is estimating the selectivity of path expressions, i.e., the number of elements reached by a specific navigatio...