Answering Queries Using Views (Synthesis Lectures on Data Management)

Foto Afrati, Rada Chirkova

  • 出版商: Morgan & Claypool
  • 出版日期: 2017-12-04
  • 售價: $3,749
  • 貴賓價: 9.5$3,562
  • 語言: 英文
  • 頁數: 235
  • 裝訂: Hardcover
  • ISBN: 168173270X
  • ISBN-13: 9781681732701

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商品描述

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.