Fundamentals of Database Systems combines clear explanations of theory and design, broad coverage of models and real systems, and excellent examples with up-to-date introductions to modern database technologies. This edition is completely revised and updated, and reflects the latest trends in technological and application development. Professors Elmasri and Navathe focus on the relational model and include coverage of recent object-oriented developments. They also address advanced modeling and system enhancements in the areas of active databases, temporal and spatial databases, and multimedia information systems. This edition also surveys the latest application areas of data warehousing, data mining, web databases, digital libraries, GIS, and genome databases. New to the Third Edition *Reorganized material on data modeling to clearly separate entity relationship modeling, extended entity relationship modeling, and object-oriented modeling *Expanded coverage of the object-oriented and object/relational approach to data management, including ODMG and SQL3 * Uses examples from real database systems including OracleTM and Microsoft AccessAE * Includes discussion of decision support app
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XML: Designing XML internet applications
由于各部分自由度不相等,因此各部分离差平方和不能比较,必须将各部分离差平方和除以相应自由度,其即比值称为均方差,简称为均方。组间均方: ,组内均方:。这时根据这两个值可以进行F检验,即: }gs}image81-5.jpg}/gs} ,表示各个样本不是来自同一总体, ...
Tackle the toughest set-based querying and query tuning problems--guided by an author team with in-depth, inside knowledge of T-SQL. Deepen your understanding of architecture and internals--and gain practical approaches and...
Get a detailed look at the internal architecture of T-SQL with this comprehensive programming reference. Database developers and administrators get best practices, expert techniques, and code samples to master the...
Second Editionnow available! World Wide Web (WWW) sites have been blossoming at an astounding rate, with good reason; WWW technology has proven extraordinarily effective at creating a flexible, interactive, and...
This book provides a practical and proven approach to designing relational databases. It contains two complementary design methodologies: logical data modeling and relational database design. The design methodologies are independent...
Relational databases have quickly come to be regarded as a natural and efficient way of organizing information. Duplicate data can be eliminated and powerful set-theoretic operations can be used to...
The first and only database primer for today's global economy Today's businesses depend on their databases to provide information essential for their day-to-day operations and to help them take advantage...
Coverage of business database systems is organized around the database development life cycle in this text, providing a basis for discussing conceptual and implementation design, database implementation, and the management...