ITM 102 Chapter Notes - Chapter 6: Data Redundancy, Database, Meridian Regional Airport

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 102
• Professor: Franklyn Prescod

Document Summary

Bit: represents the smallest unit of data a computer can handle. Byte: represents a single character which can be a letter, a number, or another symbol. Field: a group of characters into a word, a group of words, or complete number (such as a persons name or age) Record: a group of related elds, such as the students name, the course taken, the date, and the grade. File: a group of records of the same type is called a le. Entity: a person, place, thing, or event about which we store and maintain information. Attribute: each characteristic or quality describing a particular entity. Data redundancy: duplicate data in multiple data les so that the same data are stored in more than one place or location. Data inconsistency: the same attribute has different values ex some might use student_id and other might use just id.