Week 3 Flashcards
1
Q
The object in a database which has attributes.
A
Entity
2
Q
These are the things that describe an entity
A
Attribute
3
Q
This type of attribute may have many components to make it up.
A
Composite
4
Q
An attribute that may have more than one value is said to be what?
A
multivalued
5
Q
A value that has a binary degree has how many entities participating in the relationship?
A
2
6
Q
The _____ is the upper and lower limits of a relationship
A
cardinality
7
Q
A weak entity type is one that what?
A
Depends on another entity, and has that other entities Primary Key as part of its PK. This is a total participation constraint (existence dependency)
