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Questions and Answers
What is the primary key in a relation?
What is the primary key in a relation?
- Composite key
- Foreign key
- Candidate key (correct)
- Super key
Which property ensures that each attribute in a relation has a distinct name?
Which property ensures that each attribute in a relation has a distinct name?
- Atomicity (correct)
- Cardinality
- Uniqueness
- Irreducibility
What is a foreign key in a relational database?
What is a foreign key in a relational database?
- A composite key consisting of multiple attributes
- An attribute within one relation that matches the candidate key of another relation (correct)
- A super key with uniqueness and irreducibility properties
- A key that uniquely identifies a tuple within a relation
Which property ensures no duplicate tuples exist in a relation?
Which property ensures no duplicate tuples exist in a relation?
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What does a super key uniquely identify within a relation?
What does a super key uniquely identify within a relation?
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In a relational schema, what is the operator referred to as?
In a relational schema, what is the operator referred to as?
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