Answering Queries Using Views, Second Edition (Synthesis Lectures On Data Management)
Springer
ISBN13:
9783031007439
$97.68
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: Foto Afrati, Rada Chirkova
- | Publisher: Springer
- | Publication Date: Apr 16, 2019
- | Number of Pages: 276 pages
- | Language: English
- | Binding: Paperback
- | ISBN-10: 3031007433
- | ISBN-13: 9783031007439
- Author:
- Foto Afrati, Rada Chirkova
- Publisher:
- Springer
- Publication Date:
- Apr 16, 2019
- Number of pages:
- 276 pages
- Language:
- English
- Binding:
- Paperback
- ISBN-10:
- 3031007433
- ISBN-13:
- 9783031007439