Consistent Query Answers on Numerical Databases Under Aggregate Constraints
Identifieur interne : 001361 ( Main/Merge ); précédent : 001360; suivant : 001362Consistent Query Answers on Numerical Databases Under Aggregate Constraints
Auteurs : Sergio Flesca [Italie] ; Filippo Furfaro [Italie] ; Francesco Parisi [Italie]Source :
- Lecture Notes in Computer Science [ 0302-9743 ] ; 2005.
Abstract
Abstract: The problem of extracting consistent information from relational databases violating integrity constraints on numerical data is addressed. In particular, aggregate constraints defined as linear inequalities on aggregate-sum queries on input data are considered. The notion of repair as consistent set of updates at attribute-value level is exploited, and the characterization of several data-complexity issues related to repairing data and computing consistent query answers is provided.
Url:
DOI: 10.1007/11601524_18
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<front><div type="abstract" xml:lang="en">Abstract: The problem of extracting consistent information from relational databases violating integrity constraints on numerical data is addressed. In particular, aggregate constraints defined as linear inequalities on aggregate-sum queries on input data are considered. The notion of repair as consistent set of updates at attribute-value level is exploited, and the characterization of several data-complexity issues related to repairing data and computing consistent query answers is provided.</div>
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