Database-Management-System
August 29, 2024SQL
August 29, 2024Database-Management-System
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Question 486
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A primary key for an entity is :
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a candidate key
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any attribute
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a unique attribute
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a superkey
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Question 486 Explanation:
A primary key for an entity is a unique attribute. No primary key should have NULL values.
Correct Answer: C
Question 486 Explanation:
A primary key for an entity is a unique attribute. No primary key should have NULL values.