A primary key for an entity is:
2007
A primary key for an entity is:
Answer: A. a candidate key — In relational database theory, a primary key is a specific candidate key chosen to uniquely identify records in a table. It must be unique and not null,…
- A.
a candidate key
- B.
any attribute
- C.
a unique attribute
- D.
a super key
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Correct answer: A
In relational database theory, a primary key is a specific candidate key chosen to uniquely identify records in a table. It must be unique and not null, ensuring entity integrity.
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