Data Entities: Attributes & Relationships

Question 1

What is an Entity?

Answer 1

A types of thing on which an organisation may wish to hold data

Question 2

What is an Attribute?

Answer 2

The data we need to know/collect about each entity

Question 3

What is the attribute domain?

Answer 3

The set of all possible values of an attribute

Question 4

What is a Simple Attribute?

Answer 4

Those that cannot be further divided into sub-attributes

Question 5

What is a Composite Attribute?

Answer 5

An attribute that is a combination of other attributes

Question 6

What is a Single-valued attribute?

Answer 6

Only accept one value

Question 7

What is a Multi-valued attribute?

Answer 7

An attribute that can have more than one value associated with the key of the entity

Question 8

What is a Derived Attribute?

Answer 8

Can be derived from the values of other attributes

Question 9

What is a Relationship?

Answer 9

How two or more entities are linked to one another

Question 10

What shape is an Entity?

Answer 10

Rectangle