Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram?
A.
Diamonds with double/bold border
B.
Rectangles with double/bold border
C.
Ovals with double/bold border
D.
Ovals that contain underlined identifiers
Solution:
Option A: Diamonds with double/bold border represented as:
indicate weak entity relationship
Option B: Rectangles with double/bold border represented as:
indicate weak entity
Option C: Ovals with double/bold border represented as:
indicate Multivalued attribute
Option D: Ovals that contain underlined identifiers represented as:
indicate key attribute