標(biāo)題: Titlebook: Answering Queries Using Views, Second Edition; Foto Afrati,Rada Chirkova Book 2019Latest edition Springer Nature Switzerland AG 2019 [打印本頁] 作者: CHAFF 時(shí)間: 2025-3-21 18:49
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作者: 女歌星 時(shí)間: 2025-3-22 00:09
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作者: 慢慢啃 時(shí)間: 2025-3-22 02:40
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作者: 出沒 時(shí)間: 2025-3-22 07:15
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.作者: 亂砍 時(shí)間: 2025-3-22 11:44 作者: Abbreviate 時(shí)間: 2025-3-22 14:13 作者: 打折 時(shí)間: 2025-3-22 18:39
Answering Queries Using Views, Second Edition978-3-031-01871-8Series ISSN 2153-5418 Series E-ISSN 2153-5426 作者: 大猩猩 時(shí)間: 2025-3-22 22:26 作者: inspiration 時(shí)間: 2025-3-23 04:06 作者: octogenarian 時(shí)間: 2025-3-23 08:23 作者: Gleason-score 時(shí)間: 2025-3-23 10:11 作者: olfction 時(shí)間: 2025-3-23 14:21 作者: 硬化 時(shí)間: 2025-3-23 20:27 作者: exophthalmos 時(shí)間: 2025-3-24 00:00 作者: 粗野 時(shí)間: 2025-3-24 04:35 作者: NOCT 時(shí)間: 2025-3-24 10:01 作者: 柳樹；枯黃 時(shí)間: 2025-3-24 12:04
Klaus Schwerma,Andrea von MarschallIn this chapter we revisit the problems of query containment and of finding equivalent and maximally contained rewritings for the case where we are interested in applying the results only on those database instances that satisfy certain dependencies.作者: Patrimony 時(shí)間: 2025-3-24 14:58
https://doi.org/10.1007/978-3-322-80575-1The problem of answering queries using views suggests several theoretical questions. In this chapter we discuss some of these questions.作者: Amplify 時(shí)間: 2025-3-24 22:17 作者: Kinetic 時(shí)間: 2025-3-25 00:47 作者: 叢林 時(shí)間: 2025-3-25 03:39
Maximally Contained Rewritings (MCRs),We may obtain a view instance . in either of the following two ways..In Chapter 3, we only considered the CWA, as it was proper for equivalent rewritings. For contained rewritings, however, we may have the following two different definitions.作者: innovation 時(shí)間: 2025-3-25 09:50
Answering Queries in Presence of Dependencies,In this chapter we revisit the problems of query containment and of finding equivalent and maximally contained rewritings for the case where we are interested in applying the results only on those database instances that satisfy certain dependencies.作者: 蛛絲 時(shí)間: 2025-3-25 15:32
Answering Queries Using Views,The problem of answering queries using views suggests several theoretical questions. In this chapter we discuss some of these questions.作者: 節(jié)省 時(shí)間: 2025-3-25 16:45 作者: 彩色的蠟筆 時(shí)間: 2025-3-25 22:30
978-3-031-00743-9Springer Nature Switzerland AG 2019作者: Harrowing 時(shí)間: 2025-3-26 01:05 作者: 起波瀾 時(shí)間: 2025-3-26 04:34 作者: 真實(shí)的你 時(shí)間: 2025-3-26 12:08
2153-5418 formation 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作者: 空氣傳播 時(shí)間: 2025-3-26 13:12 作者: 發(fā)起 時(shí)間: 2025-3-26 17:46 作者: 失敗主義者 時(shí)間: 2025-3-27 00:38
Finding Equivalent Rewritings,eration to the fragment of the language of conjunctive queries with aggregation that is called “central rewritings.” Our focus will be on finding (minimal) equivalent rewritings in an efficient way. Other languages for rewritings will be discussed in other parts of the book.作者: 折磨 時(shí)間: 2025-3-27 04:18
Book 2019Latest editionintegration, 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.作者: Handedness 時(shí)間: 2025-3-27 09:15
https://doi.org/10.1007/978-3-322-94951-6eration to the fragment of the language of conjunctive queries with aggregation that is called “central rewritings.” Our focus will be on finding (minimal) equivalent rewritings in an efficient way. Other languages for rewritings will be discussed in other parts of the book.作者: 不滿分子 時(shí)間: 2025-3-27 11:14
Queries and Views,to which they give rise (Section 1.2). An informal discussion follows about specific technical problems in answering queries using views with concrete examples (Section 1.3). Then, for completeness and consistency of notation, we give formal definitions for the relational data model and query langua作者: 整頓 時(shí)間: 2025-3-27 16:58 作者: 有幫助 時(shí)間: 2025-3-27 19:36
Answering Queries in Data Exchange,, 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作者: overreach 時(shí)間: 2025-3-27 22:15 作者: CLASP 時(shí)間: 2025-3-28 04:27
Tree-Structured Records Queried with SQL Dialect,d to think of the instances of a tree data type as if they were tuples of a relation. We present in this chapter a data model which is defined by neither a standard relation (like the relational model) nor by a tree (like an XML document), but it is a “combination” of both. Thus, it enables the use 作者: 粗糙 時(shí)間: 2025-3-28 08:06 作者: 事先無準(zhǔn)備 時(shí)間: 2025-3-28 14:00
2153-5418 ve 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-978-3-031-00743-9978-3-031-01871-8Series ISSN 2153-5418 Series E-ISSN 2153-5426 作者: 輕率看法 時(shí)間: 2025-3-28 15:44
Book 2019Latest editionomparisons 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-作者: 法律的瑕疵 時(shí)間: 2025-3-28 19:48
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