Database-Management-System
August 29, 2024Database-Management-System
August 29, 2024Database-Management-System
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Question 688
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In a relational database model, cardinality of a relation means
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The number of constraints
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The number of tuples
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The number of attributes
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The number of tables
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Question 688 Explanation:
→ Cardinality of a relation means the number of tuples.
→ The degree of relationship (also known as cardinality) is the number of occurrences in one entity which are associated (or linked) to the number of occurrences in another.
There are three degrees of relationship, known as:
1. one-to-one (1:1)
2. one-to-many (1:M)
3. many-to-many (M:N)
→ The degree of relationship (also known as cardinality) is the number of occurrences in one entity which are associated (or linked) to the number of occurrences in another.
There are three degrees of relationship, known as:
1. one-to-one (1:1)
2. one-to-many (1:M)
3. many-to-many (M:N)
Correct Answer: B
Question 688 Explanation:
→ Cardinality of a relation means the number of tuples.
→ The degree of relationship (also known as cardinality) is the number of occurrences in one entity which are associated (or linked) to the number of occurrences in another.
There are three degrees of relationship, known as:
1. one-to-one (1:1)
2. one-to-many (1:M)
3. many-to-many (M:N)
→ The degree of relationship (also known as cardinality) is the number of occurrences in one entity which are associated (or linked) to the number of occurrences in another.
There are three degrees of relationship, known as:
1. one-to-one (1:1)
2. one-to-many (1:M)
3. many-to-many (M:N)