ADMS 2511 Lecture Notes - Lecture 4: Sql, Query Language, Database Design
5 Dec 2016
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Document Summary
Because data is processed in several stages and often in several places, it may be subject to problems and difficulties. The amount of data increases exponentially with time. Data is scattered throughout organizations and collected by many individuals using various methods and devices. Data is frequently stored in numerous servers and locations in different computing systems, databases, formats and human and computer languages. Data comes form internal sources, personal sources and external sources. Data also comes form the web, clickstream data is data that visitors and customers produce when they visit a website including user behavior and browsing patterns. New sources of data, such as blogs, podcasts, videocasts, and rfid tags and other wireless sensors are constantly being developed. Much of this data is unstructured, meaning that its content can not be truly represented in a traditional computer record. Example of this data are digital images, videos, voice packets and musical notes in an.
