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
Answer: (A)
Explanation: According to Weak Entity Set in ER diagrams:
The relation between one strong and one weak entity is represented by double diamond.
Option (A) is correct.
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