| 书目名称 | Repairing and Querying Databases under Aggregate Constraints | | 编辑 | Sergio Flesca,Filippo Furfaro,Francesco Parisi | | 视频video | | | 丛书名称 | SpringerBriefs in Computer Science | | 图书封面 |  | | 描述 | Research has deeply investigated several issues related to the use of integrity constraints on relational databases. In particular, a great deal of attention has been devoted to the problem of extracting "reliable" information from databases containing pieces of information inconsistent with regard to some integrity constraints. In this manuscript, the problem of extracting consistent information from relational databases violating integrity constraints on numerical data is addressed. 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. Moreover, a method for computing “reasonable” repairs of inconsistent numerical databases isintroduced, for a restricted but expressive class of aggregate constraints. An extension of this method for dealing with the data repairing problem in the presence of weak aggregate constraints which are expected to be satisfied, but not required to, is presented. Furthermore, a tech | | 出版日期 | Book 2011 | | 关键词 | Inconsistent databases; aggregate constraints; consistent query answer; numerical data integrity; repair | | 版次 | 1 | | doi | https://doi.org/10.1007/978-1-4614-1641-8 | | isbn_softcover | 978-1-4614-1640-1 | | isbn_ebook | 978-1-4614-1641-8Series ISSN 2191-5768 Series E-ISSN 2191-5776 | | issn_series | 2191-5768 | | copyright | The Author(s) 2011 |
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发表于 2025-3-21 18:34:26
