Chapter Overview
The purpose of this chapter is to precede students to the database progress to information systems development, the important concepts and principles of the database approach, and the database development process within the broader circumstance of information systems development. This is an important chapter because it should convey a sense of the central importance of databases in todays information systems environment. The musical theme of an organizational database is intuitively appealing to most students. However, many students give have little or no background or experience with databases. Others will have had some experience with a PC database (such as Microsoft Access), and consequently will have a limited perspective concerning an organizational approach to databases.
In this chapter we introduce the basic concepts and definitions of databases. We railway line data with information, and introduce the notion of metadata and its importance. We contrast the database approach with older file processing systems, and introduce the true pine Valley Furniture Company case to illustrate these concepts.
We light upon the range of database applications from personal computer databases to enterprise databases and identify get wind decisions that must be made for each type of database. We refer both the potential benefits and typical costs of using this approach. We overly trace the historical evolution of database systems, in tack together to get out a context for understanding the database approach for data retentivity and retrieval.
The chapter also presents an expanded description of the systems development life cps (including an introduction to rapid application development methods of prototyping and agile packet development) and the role of database development within it. The chapter provides an updated description of the well-known three-schema architecture and uses it to summarize the various...If you want to get a full essay, order it on our website: Orderessay
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