ADVICE—Educational System for Teaching Database Courses

This introduction to database systems offers a comprehensive approach, focusing on database design, database use, and implementation of database applications and database management systems. KEY TOPICS: The first half of the book provides in-depth coverage of databases ...

2009

The book is is an outcome of practical and teaching experience of the authors on the subject. It covers the syllabi of B.Tech/M.C.A./B.C.A./M.B.A. of various universities and presents an exhaustive and up-to-date exposition of database management systems in an easy-to-understand manner. It bridges the gap between theoretical learning and practical implementation of databases for various applications.

Databases based on relational, object-oriented, and object-relational models represent significant advances in database technologies. In the context of general-purpose database management systems, the fundamentals of database models are examined. A historical perspective on the evolution of major database models is provided. The principal concepts underlying relational, object-oriented, and object-relational database models are presented with examples. Finally, a brief view of database federation issues is introduced and served as the foundation for computerized databases are essential and inseparable components of most of today’s information systems and data base technology.

1989

: The purposes of this thesis is to communicate a general knowledge of software engineering principles that can be applied to the development of a software system. Fundamental Software Engineering concepts are first discussed and then applied to a personnel database management system which is featured throughout the thesis. The individual tools and techniques that are used in each phase of the system development are widely known in the computer science community and each has been employed successfully in certain situations. Keywords: Database design; Personnel systems; Greek Navy personnel database; Theses.

Lecture Notes in Computer Science, 2000

Encyclopedia of Database Systems, 2009

Chapter 7 has presented models of databases; Chap. 8 discussed means to describe databases, and now we can finally look at actual database implementation problems. In this chapter we will proceed in a top-down fashion. We begin with methods derived from formal models and continue on to systems developed over time and regular use. The discussion in this chapter proceeds in the direction of increased binding, which causes loss of flexibility but increases the performance of systems. Such important implementation issues such as reliability, access protection, integrity, and data representation are not covered in this chapter; they are separately discussed in Chaps. 11, 12, 13, and 14. We concentrate on concepts, and do not present complete system descriptions, although many actual systems will be referenced to allow further study. Appendix B can be consulted for references about the systems named in this chapter. The exact syntax of examples based on these systems has been modified at times in order to provide continuity. The fact that a certain system is cited here as a commendable example does not imply an endorsement of this implementation for a given application but only reflects on the values of the concepts being discussed. 449 Objectives We have implied earlier a number of objectives for a database system design: 1 The ability to refer to data items without having knowledge of record or file structure and as a corollary: 2 The ability to change record or file content and structure without affecting existing database programs We also desire 3 The ability to handle related files within one general framework, so that the data in separate files can remain consistent and so that excessive redundancy in updating and storage can be avoided and 4 A description of the database integrating diverse points of view, so that this description can become a communication medium between data generators and information seekers In order to achieve these lofty goals, we will consider how to implement systems that use schemas to present high-level services while using file-based, record-oriented structures. Sec. 9-1 Issues in Database Implementation 451 9-1 ISSUES IN DATABASE IMPLEMENTATION In this introductory section we will introduce briefly some concepts that recur throughout this chapter. 9-1-1 Functionality and Generality Database-management systems can be built with a wide range of generality. A categorization of these approaches into three levels distinguishes systems which support a single application, several applications of the same type, or multiple types of applications. Some systems have developed through these three levels; others have been designed consciously to attack problems at one specific level. Single-Application Database Systems An organization establishes a database operation using available file system facilities, and designs application programs that interface to the database using a centrally maintained package which implements the required degree of data and structure description. The original airline reservation system at American Airlines, SABRE, many large information systems, such as MEDLARS (a system to query the medical literature), and military command and control systems are examples of this approach. Single-Application-Type Database Systems A group of users working in some type of application area recognizes the commonality of their needs. They or their vendor design a system to match their needs. User differences are incorporated into tables and schemas specific to the user. This step often follows success with a more single-minded system. Examples of this approach are the generalized airline reservation systems (PARS), clinical information systems (TOD, GEMISCH), and bills-of-materials systems (BOMP). Multiple-Application-Type Database Systems A vendor or academic group designs a system with the intent to serve the general database needs in a better fashion. An effort is made to provide a complete set of services. There will, of course, be a tendency to emphasize aspects relating to the experience of the designers, so that in practice a great deal of difference is found among the generalized systems. Another source for generalized systems is a continued evolution from single application or application-type services. An understanding of the history of generalized systems helps to explain features of their design. The development of the CODASYL specification and of the relational model for databases has provided a basis for generalized systems that are relatively independent of past history. Generalized systems developed independently encountered so far in the text are PRTV, RETRIEVE, SOCRATE, and SQL/DS. The IDS and IMS systems owe much to the BOMP applications.

ACM SIGMOD Record, 1990

2014

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IEEE Data(base) Engineering Bulletin, 1984

Reiner@CCA UUCP: decvax!cca!reiner Database Engineering Bulletin is a quarterly publication of the IEEE Computer Society Technical Committee on Database Engineering. Its scope of interest includes: data structures and models, access strategies, access control techniques, database architecture, database machines, intelligent front ends, mass storage for very large databases, distributed database systems and techniques, database software design and implementation, database utilities, database security and related areas. Contribution to the Bulletin is hereby solicited. News items, letters, technical papers, book reviews, meeting previews, summaries, case studies, etc., should be sent to the Editor. All letters to the Editor will be considered for publication unless accompanied by a request to the contrary. Technical papers are unretereed. Opinions expressed in contributions are those of the indi vidual author rather than the oflicial position of the TC on Database Engineering, the IEEE Computer Society, or orga nizations with which the author may be affiliated. Associate Editors, Database Engineering Dr. Haran Boral Microelectronics and Computer Technology Corporation (MCC) 9430 Research Blvd.