Queries
DOWNLOAD eBooks
Download Queries PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Queries book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Answering Queries Using Views
DOWNLOAD eBooks
Author : Foto Afrati
language : en
Publisher: Springer Nature
Release Date : 2022-11-10
Answering Queries Using Views written by Foto Afrati and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-10 with Computers categories.
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.
Bounded Queries In Recursion Theory
DOWNLOAD eBooks
Author : William S. Levine
language : en
Publisher: Springer Science & Business Media
Release Date : 1998-12-23
Bounded Queries In Recursion Theory written by William S. Levine and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-12-23 with Computers categories.
One of the major concerns of theoretical computer science is the classifi cation of problems in terms of how hard they are. The natural measure of difficulty of a function is the amount of time needed to compute it (as a function of the length of the input). Other resources, such as space, have also been considered. In recursion theory, by contrast, a function is considered to be easy to compute if there exists some algorithm that computes it. We wish to classify functions that are hard, i.e., not computable, in a quantitative way. We cannot use time or space, since the functions are not even computable. We cannot use Turing degree, since this notion is not quantitative. Hence we need a new notion of complexity-much like time or spac~that is quantitative and yet in some way captures the level of difficulty (such as the Turing degree) of a function.
Notes And Queries
DOWNLOAD eBooks
Author : Anonymous
language : en
Publisher: BoD – Books on Demand
Release Date : 2023-04-22
Notes And Queries written by Anonymous and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-04-22 with Fiction categories.
Reprint of the original, first published in 1858. The publishing house Anatiposi publishes historical books as reprints. Due to their age, these books may have missing pages or inferior quality. Our aim is to preserve these books and make them available to the public so that they do not get lost.
Fourteen Queries And Ten Absurdities
DOWNLOAD eBooks
Author : Paul Hobson
language : en
Publisher: Lulu.com
Release Date : 2018-01-15
Fourteen Queries And Ten Absurdities written by Paul Hobson and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-15 with Religion categories.
About the extent of ChristÕs Death, the power of the creatures, the justice of God in condemning some, and saving others, presented by a free-willer to the Church of Christ at Newcastle, and answered by Paul Hobson, a member of the said church. In which answer is discovered, the extent of ChristÕs Death, the nature and truth of Election, the condition of the creature both before and after conversion, &c. Published in tenderness of love for the good of all, especially for the churches of Christ.
Notes And Queries
DOWNLOAD eBooks
Author :
language : en
Publisher:
Release Date : 1883
Notes And Queries written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1883 with Electronic journals categories.
Notes And Queries A Medium Of Inter Communication For Literary Men Artists Antiquaries Genealogists Etc
DOWNLOAD eBooks
Author :
language : en
Publisher:
Release Date : 1859
Notes And Queries A Medium Of Inter Communication For Literary Men Artists Antiquaries Genealogists Etc written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1859 with categories.
Postgresql Query Optimization
DOWNLOAD eBooks
Author : Henrietta Dombrovskaya
language : en
Publisher:
Release Date : 2021
Postgresql Query Optimization written by Henrietta Dombrovskaya and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Write optimized queries. This book helps you write queries that perform fast and deliver results on time. You will learn that query optimization is not a dark art practiced by a small, secretive cabal of sorcerers. Any motivated professional can learn to write efficient queries from the get-go and capably optimize existing queries. You will learn to look at the process of writing a query from the database engine's point of view, and know how to think like the database optimizer. The book begins with a discussion of what a performant system is and progresses to measuring performance and setting performance goals. It introduces different classes of queries and optimization techniques suitable to each, such as the use of indexes and specific join algorithms. You will learn to read and understand query execution plans along with techniques for influencing those plans for better performance. The book also covers advanced topics such as the use of functions and procedures, dynamic SQL, and generated queries. All of these techniques are then used together to produce performant applications, avoiding the pitfalls of object-relational mappers. You will: Identify optimization goals in OLTP and OLAP systems Read and understand PostgreSQL execution plans Distinguish between short queries and long queries Choose the right optimization technique for each query type Identify indexes that will improve query performance Optimize full table scans Avoid the pitfalls of object-relational mapping systems Optimize the entire application rather than just database queries.
Beginning Sql Queries
DOWNLOAD eBooks
Author : Clare Churcher
language : en
Publisher: Apress
Release Date : 2016-07-06
Beginning Sql Queries written by Clare Churcher and has been published by Apress this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-07-06 with Computers categories.
Beginning Queries with SQL is a friendly and easily read guide to writing queries with the all-important — in the database world — SQL language. Anyone who does any work at all with databases needs to know something of SQL, and that is evidenced by the strong sales of such books as Learning SQL (O'Reilly) and SQL Queries for Mere Mortals (Pearson). Beginning Queries with SQL is written by the author of Beginning Database Design, an author who is garnering great reviews on Amazon due to the clarity and succinctness of her writing.
Notes And Queries
DOWNLOAD eBooks
Author :
language : en
Publisher:
Release Date : 1850
Notes And Queries written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1850 with Questions and answers categories.
Flexible Query Answering Systems
DOWNLOAD eBooks
Author : Henrik Legind Larsen
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-05-30
Flexible Query Answering Systems written by Henrik Legind Larsen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-05-30 with Computers categories.
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.