Answering Queries Using Views

Answering Queries Using Views

AngličtinaEbook
Afrati, Foto
Morgan & Claypool Publishers
EAN: 9781681730325
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The topic of using views to answer queries has been popular for a few decades now, as it cuts across domains such as query optimization, information integration, data warehousing, website design, and, recently, database-as-a-service and data placement in cloud systems. This book assembles foundational work on answering queries using views in a self-contained manner, with an effort to choose material that constitutes the backbone of the research. It presents efficient algorithms and covers the following problems: query containment; rewriting queries using views in various logical languages; equivalent rewritings and maximally contained rewritings; and computing certain answers in the data-integration and data-exchange settings. Query languages that are considered are fragments of SQL, in particular, select-project-join queries, also called conjunctive queries (with or without arithmetic comparisons or negation), and aggregate SQL queries.
EAN 9781681730325
ISBN 1681730324
Typ produktu Ebook
Vydavatel Morgan & Claypool Publishers
Datum vydání 4. prosince 2017
Stránky 235
Jazyk English
Země Uruguay
Autoři Afrati, Foto; Chirkova, Rada
Editoři série Jagadish, H.V.
Série Synthesis Lectures on Data Management