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DAWAK
2009
Springer
14 years 1 days ago
Mining Violations to Relax Relational Database Constraints
Frequent constraint violations on the data stored in a database may suggest that the semantics of the represented reality is changing. In this work we propose a methodology and a t...
Mirjana Mazuran, Elisa Quintarelli, Rosalba Rossat...
SEKE
2007
Springer
14 years 1 months ago
Query Processing in Paraconsistent Databases in the Presence of Integrity Constraints
In this paper, we present an approach to query processing for paraconsistent databases in the presence of integrity constraints. Paraconsistent databases are capable of representi...
Navin Viswanath, Rajshekhar Sunderraman
VLDB
1991
ACM
114views Database» more  VLDB 1991»
13 years 11 months ago
Integrity Constraints Checking In Deductive Databases
We propose a new method for integrity checking in deductive databases.The methodaugmentsadatabasewith asetof transition and internal eventsrules,which explicitly definetheinsertio...
Antoni Olivé
ICDE
1999
IEEE
151views Database» more  ICDE 1999»
14 years 8 months ago
Data Integration by Describing Sources with Constraint Databases
We develop a data integration approach for the efficient evaluation of queries over autonomous source databases. The approach is based on some novel applications and extensions of...
Xun Cheng, Guozhu Dong, Tzekwan Lau, Jianwen Su
COOPIS
1996
IEEE
13 years 11 months ago
Integrity Constraint Checking in Federated Databases
A federated database is comprised of multiple interconnected database systems that primarily operate independently but cooperate to a certain extent. Global integrity constraints c...
Paul W. P. J. Grefen, Jennifer Widom