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QUESTION 18 Match the term that best fits its definition. v Alternate Key A A minimal set of attributes that uniquely identifies an entity. There must be one and only one of these in a single relation. v Surrogate Key v Foreign Key v Partial Primary Key v Primary Key Composite Key B. An attribute of a relation that requires the primary key of another relation in order to uniquely identify an entity of the relation C.A key that contains multiple attributes D. A key that is assigned to an entity, Le. it is not associated with a specific real-world property of that entity. E. An attribute in one relation that uniquely identifies a row in another relation F. A set attributes that uniquely identifies an entity. There may be multiple of these in a single relation.

QUESTION 18 Match the term that best fits its definition. v Alternate Key A A minimal set of attributes that uniquely identifies an entity. There must be one and only one of these in a single relation. v Surrogate Key v Foreign Key v Partial Primary Key v Primary Key Composite Key B. An attribute of a relation that requires the primary key of another relation in order to uniquely identify an entity of the relation C.A key that contains multiple attributes D. A key that is assigned to an entity, Le. it is not associated with a specific real-world property of that entity. E. An attribute in one relation that uniquely identifies a row in another relation F. A set attributes that uniquely identifies an entity. There may be multiple of these in a single relation.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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QUESTION 18 Match the term that best fits its definition. v Alternate Key A. A minimal set of attributes that uniquely identifies an entity. There must be one and only one of these in a single relation. v Surrogate Key v Foreign Key v Partial Primary Key B. An attribute of a relation that requires the primary key of another relation in arder to uniquely identify an entity of the relation C.A key that contains multiple attributes v Primary Key D. A key that is assigned to an entity, i.e. it is not associated with a specific real-world property of that entity. E. An attribute in one relation that uniquely identifies a row in another relation F. A set of attributes that uniquely identifies an entity. There may be multiple of these in a single relation. v Composite Key
Transcribed Image Text:QUESTION 18 Match the term that best fits its definition. v Alternate Key A. A minimal set of attributes that uniquely identifies an entity. There must be one and only one of these in a single relation. v Surrogate Key v Foreign Key v Partial Primary Key B. An attribute of a relation that requires the primary key of another relation in arder to uniquely identify an entity of the relation C.A key that contains multiple attributes v Primary Key D. A key that is assigned to an entity, i.e. it is not associated with a specific real-world property of that entity. E. An attribute in one relation that uniquely identifies a row in another relation F. A set of attributes that uniquely identifies an entity. There may be multiple of these in a single relation. v Composite Key
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