2012 | OriginalPaper | Buchkapitel
Obtaining Certain Results by Query Rewriting over Uncertain Database
verfasst von : Dong Xie, Xinbo Chen, Yan Zhu
Erschienen in: Software Engineering and Knowledge Engineering: Theory and Practice
Verlag: Springer Berlin Heidelberg
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Although integrity constraints effectively maintain certainty of data, and some situation may be satisfied with integrity constraints. This paper proposes uncertain databases and candidate databases. To uncertainty of tuple values in uncertain databases with different results for every candidate database, the work adjusts query semantics to employ query rewriting for computing Certain Results based on certain data semantics, the method can execute effectively SQL query in databases.