Database-Management-System
August 29, 2024Normalization
August 29, 2024Database-Management-System
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Question 516
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An entity instance is a single occurrence of an _______.
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entity type
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relationship type
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entity and relationship type
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None of these
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Question 516 Explanation:
→ Entity type is the heading or schema and entity instance is the value of entity type at a particular instance.
Example:
PERSON(Age, Name, Address) is the Entity Type and PERSON( 28, Anand, Hyderabad) is the entity instance i.e. value of PERSON at a particular instance.
Example:
PERSON(Age, Name, Address) is the Entity Type and PERSON( 28, Anand, Hyderabad) is the entity instance i.e. value of PERSON at a particular instance.
Correct Answer: A
Question 516 Explanation:
→ Entity type is the heading or schema and entity instance is the value of entity type at a particular instance.
Example:
PERSON(Age, Name, Address) is the Entity Type and PERSON( 28, Anand, Hyderabad) is the entity instance i.e. value of PERSON at a particular instance.
Example:
PERSON(Age, Name, Address) is the Entity Type and PERSON( 28, Anand, Hyderabad) is the entity instance i.e. value of PERSON at a particular instance.