Answering Queries Using Views

Author : Foto Afrati
Publisher : Springer Nature
ISBN 13 : 3031018591
Total Pages : 229 pages
Book Rating : 4.96/5 ( download)

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Download or read book Answering Queries Using Views written by Foto Afrati and published by Springer Nature. This book was released on 2022-11-10 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Author : Foto Afrati
Publisher : Springer Nature
ISBN 13 : 3031018710
Total Pages : 253 pages
Book Rating : 4.18/5 ( download)

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Download or read book Answering Queries Using Views, Second Edition written by Foto Afrati and published by Springer Nature. This book was released on 2022-05-31 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 two new 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-like data model and query language where the tuples of a relation share a tree-structured schema for that relation and the query language is a dialect of SQL with evaluation techniques appropriately modified to fit the richer schema.

Author : Nima Mohajerin
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.65/5 ( download)

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Download or read book A Top-down Approach to Answering Queries Using Views written by Nima Mohajerin and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Troels Andreasen
Publisher : Springer Science & Business Media
ISBN 13 : 3642049567
Total Pages : 688 pages
Book Rating : 4.69/5 ( download)

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Download or read book Flexible Query Answering Systems written by Troels Andreasen and published by Springer Science & Business Media. This book was released on 2009-10-15 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 8th International Conference on Flexible Query Answering Systems, FQAS 2009, held in Roskilde, Denmark, in October 2009. The 57 papers included in this volume were carefully reviewed and selected from 90 submissions. They are structured in topical sections on database management, information retrieval, extraction and mining, ontologies and semantic web, intelligent information extraction from texts, advances in fuzzy querying, personalization, preferences, context and recommendation, and Web as a stream.

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.60/5 ( download)

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Download or read book Algorithms for Selecting Views and Indexes to Answer Queries written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In many contexts it is beneà ̄¬ cial to answer database queries using derived data called views. Using views in query answering is relevant in applications in information integration, data warehousing, web-site design, and query optimization. The problem of answering queries using views can be divided into a number of subproblems. The à ̄¬ rst step in the process of view selection is to identify which view can be used to answer queries from the given set. The second step is to determine possible reformulations of the workload queries. The last step is choosing views that can be maintained appropriately and that minimize the processing time of the input query workload. In our work we address the problem of selecting and precomputing indexes and materialized views in a database system, with the goal of improving the processing performance for frequent and important queries. The focus of our work is to develop a unià ̄¬ ed quality-centered view- and index-selection approach, for a range of query, view, and index classes that are typical in practical database systems. To the best of our knowledge, we are the à ̄¬ rst to adopt the solution-quality focus for this generic practical problem setting.

Author : Henrik Legind Larsen
Publisher : Springer Science & Business Media
ISBN 13 : 3540346384
Total Pages : 730 pages
Book Rating : 4.88/5 ( download)

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Download or read book Flexible Query Answering Systems written by Henrik Legind Larsen and published by Springer Science & Business Media. This book was released on 2006-05-30 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceeding of the 7th International Conference on Flexible Query Answering Systems, FQAS 2006, held in Milan, Italy in June 2006. The 60 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on flexibility in database management and quering, vagueness and uncertainty in XML quering and retrieval, information retrieval and filtering, multimedia information access, user modeling and personalization, knowledge and data extraction, intelligent information extraction from text, and knowledge representation and reasoning.

Author : Sourav S. Bhowmick
Publisher : Springer Science & Business Media
ISBN 13 : 3540856536
Total Pages : 872 pages
Book Rating : 4.35/5 ( download)

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Download or read book Database and Expert Systems Applications written by Sourav S. Bhowmick and published by Springer Science & Business Media. This book was released on 2008-08-18 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 19th International Conference on Database and Expert Systems Applications, DEXA 2008, held in Turin, Italy, in September 2008. The 74 revised full papers presented together with 1 invited paper were carefully reviewed and selected from 208 submissions. The papers are organized in topical sections on data privacy; temporal, spatial and high dimensional databases; semantic Web and ontologies; query processing; Web and information retrieval; mobile data and information; data and information streams; data mining algorithms; multimedia databases; data mining systems, data warehousing, OLAP; data and information semantics; XML databases; applications of database, information, and decision support systems; and schema, process and knowledge modelling and evolution.

Author : Johann Eder
Publisher : Springer Science & Business Media
ISBN 13 : 3540285857
Total Pages : 405 pages
Book Rating : 4.54/5 ( download)

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Download or read book Advances in Databases and Information Systems written by Johann Eder and published by Springer Science & Business Media. This book was released on 2005-08-29 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 9th East European Conference on Advances in Databases and Information Systems, ADBIS 2005, held in Tallinn, Estonia, in September 2005. The 27 revised full papers presented together with an invited paper were carefully reviewed and selected from 144 submissions. The papers are organized in topical sections on database theory, database modelling and physical database design, query processing, heterogeneous databases and interoperability, XML and databases, data mining and knowledge discovery, information systems and software engineering, and information systems development.

Author : Trevor Bench-Capon
Publisher : Springer
ISBN 13 : 3540483098
Total Pages : 1123 pages
Book Rating : 4.90/5 ( download)

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Download or read book Database and Expert Systems Applications written by Trevor Bench-Capon and published by Springer. This book was released on 2003-07-31 with total page 1123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Database and Expert Systems Applications (DEXA) conferences bring together researchers and practitioners from all over the world to exchange ideas, experiences and opinions in a friendly and stimulating environment. The papers are at once a record of what has been achieved and the first steps towards shaping the future of information systems. DEXA covers a broad field, and all aspects of database, knowledge base and related technologies and their applications are represented. Once again there were a good number of submissions: 241 papers were submitted and of these the programme committee selected 103 to be presented. DEXA’99 took place in Florence and was the tenth conference in the series, following events in Vienna, Berlin, Valencia, Prague, Athens, London, Zurich, Toulouse and Vienna. The decade has seen many developments in the areas covered by DEXA, developments in which DEXA has played its part. I would like to express thanks to all the institutions which have actively supported and made possible this conference, namely: • University of Florence, Italy • IDG CNR, Italy • FAW – University of Linz, Austria • Austrian Computer Society • DEXA Association In addition, we must thank all the people who have contributed their time and effort to make the conference possible. Special thanks go to Maria Schweikert (Technical University of Vienna), M. Neubauer and G. Wagner (FAW, University of Linz). We must also thank all the members of the programme committee, whose careful reviews are important to the quality of the conference.

Author : VLDB
Publisher : Morgan Kaufmann
ISBN 13 : 0120884690
Total Pages : 1415 pages
Book Rating : 4.98/5 ( download)

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Download or read book Proceedings 2004 VLDB Conference written by VLDB and published by Morgan Kaufmann. This book was released on 2004-09-17 with total page 1415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the 30th Annual International Conference on Very Large Data Bases held in Toronto, Canada on August 31 - September 3 2004. Organized by the VLDB Endowment, VLDB is the premier international conference on database technology.