2338 search results - page 201 / 468 » Using UML to model relational database operations |
143
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CAISE
2005
Springer
16 years 3 days ago
2005
Springer
In data integration, a Merge operator takes as input a pair of schemas in some conceptual modelling language, together with a set of correspondences between their constructs, and p...
152
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PODS
2007
ACM
16 years 6 months ago
2007
ACM
Schema mappings are high-level specifications that describe the relationship between two database schemas. Two operators on schema mappings, namely the composition operator and th...
182
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SIGMOD
2001
ACM
16 years 6 months ago
2001
ACM
We study the problem of generating e cient, equivalent rewritings using views to compute the answer to a query. We take the closed-world assumption, in which views are materialize...
165
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RTSS
1993
IEEE
15 years 10 months ago
1993
IEEE
This paper presents a technique that is capable of supporting two major requirements for concurrency control in real-time databases: data temporal consistency, and data logical co...
186
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SSD
2009
Springer
16 years 1 months ago
2009
Springer
The standard database mechanisms for concurrency control, which include transactions and locking protocols, do not provide the support needed for updating complex geographic data i...