ITEC 1010 Chapter Notes - Chapter 3: Social Graph, Data Mining, Online Analytical Processing

• School: York University
• Department: Information Technology
• Course: ITEC 1010
• Professor: Radu Campeanu

Document Summary

Data is generally organized in a hierarchy that begins with the smallest piece of data used by computers (a bit) and progresses through the hierarchy to a database. A bit can be organized into units called bytes. Character is the basic building block of most information. It can be uppercase letter, lowercase letter, numeric digit or special symbol. Field is a combination of characters that describes an aspect of a business object or activity. Record is a collection of data fields all related to one object, activity, or individual. Database is a collection of integrated and related files. Entity is a person, place or thing (object) for which data is collected, stored and maintained. Examples of entities include employees, products and plants. Attribute is a characteristic of an entity. Data item is the specific value if an attribute. It can be found in the fields of the records describing an entity.