Distributed Database Management Systems: A Practical by Saeed K. Rahimi, Frank S. Haug

By Saeed K. Rahimi, Frank S. Haug

This publication addresses matters on the topic of coping with facts throughout a allotted database approach. it really is distinct since it covers conventional database concept and present learn, explaining the problems in delivering a unified consumer interface and worldwide info dictionary. The booklet provides implementers tips on hiding discrepancies throughout platforms and developing the semblance of a unmarried repository for clients. it is also 3 pattern frameworks—implemented utilizing J2SE with JMS, J2EE, and Microsoft .Net—that readers can use to profit the right way to enforce a disbursed database administration process. IT and improvement teams and machine sciences/software engineering graduates will locate this advisor useful.

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Extra info for Distributed Database Management Systems: A Practical Approach

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Chapter 10: Data Modeling Overview This chapter provides an overview of data modeling concepts and techniques, examines data modeling, and discusses its purpose. We consider different ways to create and categorize data models and data modeling languages and next, focus on conceptual data modeling and present three different languages for creating conceptual data models and diagrams. We explore entity relationship modeling in detail and consider some other conceptual modeling techniques. We briefly discuss logical data modeling and how its purpose is different from conceptual data modeling.

A DBE and is usually implemented differently, including different syntax, features, and restrictions for the queries and commands. However, we would expect most modern DBMSs (including nonrelational ones) to provide some sort of UI-S. 3 shows an example of a typical DBE providing these expected services. 3; it contains all the same services, but we have bundled the services into four subsystems: the application processor (AP), the query processor (QP), the command processor (CP), and the data accessor (DA).

Every DBE must include a service providing the ability to retrieve data from the DB. We will call this the Data Read Service (Drd-S). Since most DBEs also have at least a basic level of privacy or confidentiality, there should always be some form of Security Service (Sec-S). ” Any real-world DBE should have a Sec-S providing both authentication and authorization, which we will discuss further in Chapter 9. The Drd-S uses the Sec-S to ensure that private data remains unseen by those without proper permissions.

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