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Titlebook: Answering Queries Using Views, Second Edition; Foto Afrati,Rada Chirkova Book 2019Latest edition Springer Nature Switzerland AG 2019

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發(fā)表于 2025-3-21 18:49:26 | 只看該作者 |倒序?yàn)g覽 |閱讀模式
期刊全稱(chēng)Answering Queries Using Views, Second Edition
影響因子2023Foto Afrati,Rada Chirkova
視頻videohttp://file.papertrans.cn/159/158163/158163.mp4
學(xué)科分類(lèi)Synthesis Lectures on Data Management
圖書(shū)封面Titlebook: Answering Queries Using Views, Second Edition;  Foto Afrati,Rada Chirkova Book 2019Latest edition Springer Nature Switzerland AG 2019
影響因子.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. ..This second edition includes twonew chapters that refer to tree-like data and respective query languages. Chapter 8 presents the data model for XML documents and the XPath query language, and Chapter 9 provides a theoretical presentation of tree-
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發(fā)表于 2025-3-22 00:09:29 | 只看該作者
https://doi.org/10.1007/978-3-322-94951-6 of CQ, CQAC, and CQN queries and views, as well as aggregate queries. We generally restrict the discussion to the cases where we are looking for a rewriting in the language of conjunctive queries, with or without ACs and negation. Furthermore, in the case of aggregate queries we restrict our consid
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發(fā)表于 2025-3-22 02:40:32 | 只看該作者
Klaus Schwerma,Andrea von Marschall, for a set of views . defined on the schema of ., we are given an instance ., which is either the set of all tuples in .(.) or its subset. So, being unable to compute . directly on ., we have to find techniques for answering . on the instance . whose schema is that of the view relations. The approa
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發(fā)表于 2025-3-22 07:15:18 | 只看該作者
Klaus Schwerma,Andrea von Marschalllar fragment of XPath, which is such a query language. This is the fragment that includes wildcard, descendant, and branching. In this chapter, we present efficient query containment tests and define and discuss equivalent rewritings.
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Answering Queries Using Views, Second Edition978-3-031-01871-8Series ISSN 2153-5418 Series E-ISSN 2153-5426
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