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软件类型:国外书籍 软件分类:Oracle 授权方式:免费版 界面语言:英文 软件大小:1030KB 运行环境:Win9x,NT,2000,XP,2003 软件等级:★★★☆☆ 发布时间:2010-07-20 下载次数:
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Special Edition Using Oracle8电子书籍介绍
Special Edition Using Oracle8
Over the years, there have been many definitions of database. For our purposes, a database is an
organized collection of data serving a central purpose. It is organized in the sense that it contains data
that is stored, formatted, accessed, and represented in a consistent manner. It serves a central purpose in
that it does not contain extraneous or superfluous data. A phone book is a good example of a database. It
contains relevant data (that is, names) that allow access to phone numbers. It does not contain irrelevant
data, such as the color of a person's phone. It stores only what is relevant to its purpose. Most often, a
database's purpose is business, but it may store scientific, military, or other data not normally thought of
as business data. Hence, there are business databases, scientific databases, military databases, and the list
goes on and on. In addition, data can not only be categorized as to its business, but also its format.
Modern databases contain many types of data other than text and numeric. For example, it is now
commonplace to find databases storing pictures, graphs, audio, video, or compound documents, which
include two or more of these types.
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