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- W2365962334 abstract "Integrity constraints are used to define the data semantics in databases.The database instanced and the tuples violating the constraints were inconsistent.Consistent query answering was one technique to obtain consistent answer from inconsistent database.The applicable areas of current techniques were limited because they supported little types of constraints or their high computation complexity.This paper presented a new approach based on null repair.Transformed the constraints first to unified format to locate inconsistency,and then rewritten the original SQL queries to query consistent answers by treating inconsistent attributes as nulls.The implementation of the system and the experiment results show that this approach can achieve stable performance under multiple combinations of constraints and SQL queries." @default.
- W2365962334 created "2016-06-24" @default.
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- W2365962334 date "2009-01-01" @default.
- W2365962334 modified "2023-09-25" @default.
- W2365962334 title "Consistent query answering based on virtual repairs with nulls" @default.
- W2365962334 hasPublicationYear "2009" @default.
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