標題: Titlebook: Answering Queries Using Views; Foto Afrati,Rada Chirkova Book 2018 Springer Nature Switzerland AG 2018 [打印本頁] 作者: 兩邊在擴散 時間: 2025-3-21 17:10
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書目名稱Answering Queries Using Views讀者反饋
書目名稱Answering Queries Using Views讀者反饋學科排名
作者: Urea508 時間: 2025-3-21 22:27
Finding Equivalent Rewritings, 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: diskitis 時間: 2025-3-22 01:24
Answering Queries in Data Exchange, for a set of views V 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 approach w作者: Fallibility 時間: 2025-3-22 08:21 作者: 玷污 時間: 2025-3-22 11:28
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: Diuretic 時間: 2025-3-22 14:08 作者: 射手座 時間: 2025-3-22 19:18
Deskriptive und explorative Statistik, examples (Section 1.3). Then, for completeness and consistency of notation, we give formal definitions for the relational data model and query languages (Section 1.4). We conclude the chapter with an outline of the structure of the book.作者: progestin 時間: 2025-3-22 21:43
Queries and Views, examples (Section 1.3). Then, for completeness and consistency of notation, we give formal definitions for the relational data model and query languages (Section 1.4). We conclude the chapter with an outline of the structure of the book.作者: spondylosis 時間: 2025-3-23 01:28
Book 2018ages 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..作者: mediocrity 時間: 2025-3-23 08:19 作者: cauda-equina 時間: 2025-3-23 10:16
Book 2018integration, 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: 構想 時間: 2025-3-23 15:09 作者: 可能性 時間: 2025-3-23 19:16 作者: 終止 時間: 2025-3-23 23:21 作者: 陳腐思想 時間: 2025-3-24 03:34
Bibliographical Notes,rk that either precedes or follows the development of the results presented in this book; the aims of the discussion include covering seminal papers that started some of the lines of work, as well as outlining major recent activity on the topic.作者: assent 時間: 2025-3-24 07:44 作者: negligence 時間: 2025-3-24 13:50
Answering Queries Using Views978-3-031-01859-6Series ISSN 2153-5418 Series E-ISSN 2153-5426 作者: 過渡時期 時間: 2025-3-24 16:43 作者: Introduction 時間: 2025-3-24 20:51 作者: Fierce 時間: 2025-3-25 02:54
https://doi.org/10.1007/978-3-642-15226-9The problem of rewriting queries using views is closely related to the problem of checking for query containment or equivalence. For most classes of problems, containment tests enable simple algorithms to rewrite queries using views. Rewriting queries is one of the techniques that is most often used to answer queries using views.作者: 肥料 時間: 2025-3-25 04:15
Wiener Studienjahre: 1906-1910,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: 吞下 時間: 2025-3-25 09:38
Wiener Studienjahre: 1906-1910,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: maverick 時間: 2025-3-25 13:24
Determiniertheit unendlicher Spiele,The problem of answering queries using views suggests several theoretical questions. In this chapter we discuss some of these questions.作者: Lament 時間: 2025-3-25 18:40
,Die H-?hnlichkeit der Alkalispektren,What we covered in this book can be arranged along the following four axes that cut across chapters.作者: Coronary-Spasm 時間: 2025-3-25 20:31
Query Containment and Equivalence,The problem of rewriting queries using views is closely related to the problem of checking for query containment or equivalence. For most classes of problems, containment tests enable simple algorithms to rewrite queries using views. Rewriting queries is one of the techniques that is most often used to answer queries using views.作者: Femish 時間: 2025-3-26 03:24 作者: Senescent 時間: 2025-3-26 04:35 作者: Complement 時間: 2025-3-26 10:19
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: 衣服 時間: 2025-3-26 14:01
Conclusion,What we covered in this book can be arranged along the following four axes that cut across chapters.作者: ferment 時間: 2025-3-26 17:00
Deskriptive und explorative Statistik,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: Albinism 時間: 2025-3-26 21:17
https://doi.org/10.1007/978-3-642-25798-8 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: 使尷尬 時間: 2025-3-27 01:54 作者: Tailor 時間: 2025-3-27 09:03
https://doi.org/10.1007/978-3-663-07074-0rk that either precedes or follows the development of the results presented in this book; the aims of the discussion include covering seminal papers that started some of the lines of work, as well as outlining major recent activity on the topic.作者: somnambulism 時間: 2025-3-27 10:52
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