Query Processing in Database Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Query Processing in Database Systems write by W. Kim. This book was released on 2012-12-06. Query Processing in Database Systems available in PDF, EPUB and Kindle. This book is an anthology of the results of research and development in database query processing during the past decade. The relational model of data provided tremendous impetus for research into query processing. Since a relational query does not specify access paths to the stored data, the database management system (DBMS) must provide an intelligent query-processing subsystem which will evaluate a number of potentially efficient strategies for processing the query and select the one that optimizes a given performance measure. The degree of sophistication of this subsystem, often called the optimizer, critically affects the performance of the DBMS. Research into query processing thus started has taken off in several directions during the past decade. The emergence of research into distributed databases has enormously complicated the tasks of the optimizer. In a distributed environment, the database may be partitioned into horizontal or vertical fragments of relations. Replicas of the fragments may be stored in different sites of a network and even migrate to other sites. The measure of performance of a query in a distributed system must include the communication cost between sites. To minimize communication costs for-queries involving multiple relations across multiple sites, optimizers may also have to consider semi-join techniques.
Query Processing for Advanced Database Systems
Query Processing for Advanced Database Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Query Processing for Advanced Database Systems write by Johann Christoph Freytag. This book was released on 1994. Query Processing for Advanced Database Systems available in PDF, EPUB and Kindle. The chapters of this book provide an excellent snapshot of current research and development activities in the area of query processing and optimization. They supply potential answers to many questions that have been raised for new types of database systems and at the same time reflect the variety of the different approaches taken. The book acts both as a reference for the state of the art in query processing for the "next generation" of database systems, and as a good starting point for anybody interested in understanding the challenging questions in the area. Furthermore, the book will help the reader to gain an in-depth understanding of why efficient query processing is needed for future database systems.
Principles of Database Query Processing for Advanced Applications
Principles of Database Query Processing for Advanced Applications - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Principles of Database Query Processing for Advanced Applications write by Clement T. Yu. This book was released on 1998. Principles of Database Query Processing for Advanced Applications available in PDF, EPUB and Kindle. A thorough presentation of query processing techniques in a broad range of database systems for advanced applications. Provides the most effective query processing techniques and ways to optimize the information retrieval process. Intended for database systems designers creating advanced applications.
Data Management and Query Processing in Semantic Web Databases
Data Management and Query Processing in Semantic Web Databases - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Data Management and Query Processing in Semantic Web Databases write by Sven Groppe. This book was released on 2011-04-29. Data Management and Query Processing in Semantic Web Databases available in PDF, EPUB and Kindle. The Semantic Web, which is intended to establish a machine-understandable Web, is currently changing from being an emerging trend to a technology used in complex real-world applications. A number of standards and techniques have been developed by the World Wide Web Consortium (W3C), e.g., the Resource Description Framework (RDF), which provides a general method for conceptual descriptions for Web resources, and SPARQL, an RDF querying language. Recent examples of large RDF data with billions of facts include the UniProt comprehensive catalog of protein sequence, function and annotation data, the RDF data extracted from Wikipedia, and Princeton University’s WordNet. Clearly, querying performance has become a key issue for Semantic Web applications. In his book, Groppe details various aspects of high-performance Semantic Web data management and query processing. His presentation fills the gap between Semantic Web and database books, which either fail to take into account the performance issues of large-scale data management or fail to exploit the special properties of Semantic Web data models and queries. After a general introduction to the relevant Semantic Web standards, he presents specialized indexing and sorting algorithms, adapted approaches for logical and physical query optimization, optimization possibilities when using the parallel database technologies of today’s multicore processors, and visual and embedded query languages. Groppe primarily targets researchers, students, and developers of large-scale Semantic Web applications. On the complementary book webpage readers will find additional material, such as an online demonstration of a query engine, and exercises, and their solutions, that challenge their comprehension of the topics presented.
Adaptive Query Processing
Adaptive Query Processing - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Adaptive Query Processing write by Amol Deshpande. This book was released on 2007. Adaptive Query Processing available in PDF, EPUB and Kindle. Adaptive Query Processing surveys the fundamental issues, techniques, costs, and benefits of adaptive query processing. It begins with a broad overview of the field, identifying the dimensions of adaptive techniques. It then looks at the spectrum of approaches available to adapt query execution at runtime - primarily in a non-streaming context. The emphasis is on simplifying and abstracting the key concepts of each technique, rather than reproducing the full details available in the papers. The authors identify the strengths and limitations of the different techniques, demonstrate when they are most useful, and suggest possible avenues of future research. Adaptive Query Processing serves as a valuable reference for students of databases, providing a thorough survey of the area. Database researchers will benefit from a more complete point of view, including a number of approaches which they may not have focused on within the scope of their own research.
