Computer Science
What do you understand by the terms Candidate Key and Cardinality of a relation in relational database ?
Relational Database
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Answer
All attribute combinations inside a relation that can serve as primary key are candidate keys as they are candidates for the primary key position.
The number of rows in a relation is known as cardinality of the relation.
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Related Questions
What is the importance of a Primary Key in a table ? Explain with a suitable example.
What do you understand by the terms Primary Key and Degree of a relation in relational database ?
A relational database consists of a collection of
- Tables
- Fields
- Records
- Keys
A relational database consists of a collection of
- Tuples
- Attributes
- Relations
- Keys