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212
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SIGMOD
2007
ACM
147views Database» more  SIGMOD 2007»
16 years 3 months ago
Extending relational query optimization to dynamic schemas for information integration in multidatabases
This paper extends relational processing and optimization to the FISQL/FIRA languages for dynamic schema queries over multidatabases. Dynamic schema queries involve the creation a...
Catharine M. Wyss, Felix I. Wyss
163
Voted
ADC
2005
Springer
114views Database» more  ADC 2005»
15 years 9 months ago
Optimization of Relational Preference Queries
The design and implementation of advanced personalized database applications requires a preference-driven approach. Representing preferences as strict partial orders is a good cho...
Bernd Hafenrichter, Werner Kießling
115
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PODS
2003
ACM
114views Database» more  PODS 2003»
16 years 3 months ago
An information-theoretic approach to normal forms for relational and XML data
Normalization as a way of producing good database designs is a well-understood topic. However, the same problem of distinguishing well-designed databases from poorly designed ones...
Marcelo Arenas, Leonid Libkin
ER
2007
Springer
102views Database» more  ER 2007»
15 years 7 months ago
Relational Data Tailoring Through View Composition
This paper presents a methodology to derive views over a relational database by applying a sequence of appropriately defined operations to the global schema. Such tailoring and com...
Cristiana Bolchini, Elisa Quintarelli, Rosalba Ros...
PODS
2005
ACM
118views Database» more  PODS 2005»
16 years 3 months ago
On the complexity of division and set joins in the relational algebra
We show that any expression of the relational division operator in the relational algebra with union, difference, projection, selection, constant-tagging, and joins, must produce ...
Dirk Leinders, Jan Van den Bussche