Download Advanced Database Systems by Narain Gehani, H. V. Jagadish, O. Shmueli (auth.), Nabil R. PDF

By Narain Gehani, H. V. Jagadish, O. Shmueli (auth.), Nabil R. Adam, Bharat K. Bhargava (eds.)

Database administration is attracting broad curiosity in either educational and commercial contexts. New software parts resembling CAD/CAM, geographic info structures, and multimedia are rising. the desires of those program components are way more advanced than these of traditional company functions. the aim of this ebook is to compile a collection of present learn matters that addresses a extensive spectrum of themes regarding database platforms and purposes. The ebook is split into 4 elements: - object-oriented databases, - temporal/historical database structures, - question processing in database structures, - heterogeneity, interoperability, open method architectures, multimedia database systems.

Show description

Read or Download Advanced Database Systems PDF

Similar organization and data processing books

Macs on the Go!: Guide to Mobile Computing for Mac Laptops Using Mac OS X

With laptops, notebooks, and pill computers slated to make up greater than 1/2 all U. S. computer revenues through 2007, cellular computing is not any longer constrained to company clients and equipment hounds. in case you plan to take your Mac at the street, this e-book exhibits you the way to take action speedy, successfully, and with not less than trouble and complications!

The relational model for database management: version 2

Written via the originator of the relational version, this e-book covers the sensible features of the layout of relational databases. the writer defines twelve ideas that database administration structures have to stick with to be able to be defined as actually relational after which supplies the inducement at the back of those ideas.

DB2 Universal Database for OS/390 v7.1 Application Certification Guide

This advisor outlines the recommendations and provides instructions for DB2 UDB program improvement, with specific realization to information buildings, SQL, saved techniques, programming and language environments, item- relational gains, and debugging. A pattern examination is integrated at the spouse CD. Lawson is a expert.

Additional resources for Advanced Database Systems

Example text

Sn such that si > sl > 82 > ... > sn > sj. 2, we have Super_user > Chief_accountant > Accountant > Employee. Objects The ORION authorization model considers the following objects as objects to be protected: databases, classes in the database, instances of classes and their components (attributes, values, and methods). , the set of instances of a class or the set of values of an attribute) as objects to be protected. In this way authorizations can be specified on the set of objects contained in a given object using the same access modes specified for the object itself, without the need of introducing further access modes.

According to many object-oriented languages, the model distinguishes between public and private methods. , end- users, application programs, other objects). That previous notion of public/private methods has been further refined by allowing methods to be defined public with respect to some other methods, of the same or different objects. The method is then considered private for all methods for which it has not been explicitly defined as public. In this way, it is possible to specify that some methods cannot be invoked directly by the users of the object but can be invoked during the execution of some other methods.

The set of methods for which a specific method is public is called the invocation scope of the 36 C H A P T E R 2. A C C E S S C O N T R O L S IN O 0 D A T A B A S E S Y S T E M S method. T h e m o d e l is b a s e d on a u t h o r i z a t i o n s for users to execute m e t h o d s on objects. A u t h o r i z a t i o n s specify, for each user, t h e set of m e t h o d s t h e user can invoke on which o b j e c t s . Therefore, a u t h o r i z a t i o n s have t h e form < o, u, m >, where o is an object, u is a user, m is a m e t h o d .

Download PDF sample

Rated 4.61 of 5 – based on 17 votes