Basic Concepts of Entity-Relationship Model

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Basic Concepts of Entity-Relationship Model
Basic Concepts of Entity-Relationship Model
DBMS: Entity-Relationship (ER) Model
Topics discussed:
1. Terminologies in relation to the ER Model:
a. Entity.
b. Attributes:
• Composite vs Simple Attributes
• Single-valued vs Multivalued Attributes
• Derived vs Stored Attributes
c. Complex Attributes.
d. Null values.
e. Entity Type, Entity Set.
f. Key Attribute & Value Set of Attributes.

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