Logical association among entities is called relationship - Designing the System

Q.  The logical association among entities is called relationship.
- Published on 24 Jul 15

a. True
b. False

ANSWER: True

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    Discussion

  • Nirja Shah   -Posted on 15 Oct 15
    - The Entity-Relationship (ER) Model is based on the notion of real-world entities and relationships among them.

    - While creating a real-world scenario into the database model, the ER Model creates entity set, relationship set, general attributes and constraints.

    - We use the ER Model for the conceptual design of a database.

    Relationship
    - The logical association among entities is called relationship.
    - Relationships are mapped with entities in various ways.
    - The number of association between two entities is known as mapping cardinalities

    - Different types of mapping cardinalities are:

    1. one to one
    2. one to many
    3. many to one
    4. many to many

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