COSC 111 Chapter Notes - Chapter 9: Unique Key, Hard Disk Drive, Database
9 Dec 2014
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Document Summary
Database: collection of data organized in a manner that allows access, retrieval, and use of the data. Data: a collection of unprocessed items, which can include text, numbers, images, audio, and video. Information: processed data that is organized, meaningful, and useful. Database management system (dbms): users create a computerized database; add, modify, and delete data in the database; sort and retrieve data from the database; and create forms and reports from the data in the database. Garbage in, garbage out: a computing phrase that points out the accuracy of a computers output depends on the accuracy of the input. A database contains files, a file contains records, a record contains fields, and a field is made up of one or more characters. A bit is the smallest unit of data the computer can process. 8 bits grouped together in a unit comprise a byte.
