Entity Relationship Model Flashcards
1
Q
What is an Entity?
A
A thing in the real world, can be a concept
2
Q
Attributes
A
Properties that descirbe entities
3
Q
Composite Attributes
A
Can be divided into further parts
4
Q
Simple Attribute
A
Can not be divided further
5
Q
Single Valued attributes
A
1 value for a particular entity
6
Q
Multivalued entity
A
Can have a set of values for a particular entity
7
Q
Derived Attributes
A
Can be derived from other attributes
8
Q
Automic Data
A
Data that is unique