INFOMAN - Midterm Module 1

unprocessed, meaningless by themselves - facts, text, graphics, images, sound, video segments (structured or structured)

• Data

• Information

• Record

• Database

Data processed to be useful in decision-making (actionable = we can make decisions out of information once data has been process)

• Data

• Information

• Record

• Database

Data Hierarchy

8 bits grouped together to represent a character.

Data Hierarchy

 Smallest data unit; value is either 0 or 1.

Data Hierarchy

aka column/attribute, a group of related characters (e.g., Student Name).

Data Hierarchy

aka row/tuple, a group of related fields (e.g., all details of a student).

Data Hierarchy

 aka, table, a collection of similar records (e.g., Student list).

Data Hierarchy

A collection of logically related files.

Components of the Database Environment

computer-aided software engineering
 Software for database design.

Components of the Database Environment

centralized storehouse of metadata