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Questions and Answers
What is an attribute that can be calculated from other attributes?
What is an attribute that can be calculated from other attributes?
What is the minimal set of attributes that uniquely identifies an entity in the entity list?
What is the minimal set of attributes that uniquely identifies an entity in the entity list?
What is a single candidate key designated as in a single entity?
What is a single candidate key designated as in a single entity?
What is an example of a derived attribute in an employee entity?
What is an example of a derived attribute in an employee entity?
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What are the attributes that contain multiple values called?
What are the attributes that contain multiple values called?
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What is a characteristic of a weak entity type?
What is a characteristic of a weak entity type?
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What can be multiple in a single entity, according to the entity list?
What can be multiple in a single entity, according to the entity list?
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What are the attributes in the weak entity that participate in the primary key called?
What are the attributes in the weak entity that participate in the primary key called?
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What is the cardinality of the identifying relationship between the owner entity and the weak entity?
What is the cardinality of the identifying relationship between the owner entity and the weak entity?
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What is the relationship between the owner entity and the weak entity called?
What is the relationship between the owner entity and the weak entity called?
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What is a requirement for a weak entity in the identifying relationship?
What is a requirement for a weak entity in the identifying relationship?
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What is a composite key composed of?
What is a composite key composed of?
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What is the primary key of a relation?
What is the primary key of a relation?
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What is a super key?
What is a super key?
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What is the difference between a primary key and a super key?
What is the difference between a primary key and a super key?
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What is an example of a composite key?
What is an example of a composite key?
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What is the purpose of a key in a relation?
What is the purpose of a key in a relation?
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