995 search results - page 142 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
133
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FQAS
2004
Springer
15 years 5 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...
105
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SIGMOD
1996
ACM
15 years 6 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...
117
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ICDE
2010
IEEE
15 years 4 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...
206
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SIGMOD
2008
ACM
16 years 2 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...
110
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XSYM
2004
Springer
15 years 7 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...