What is a primary key in the context of an RDBMS ?
2024
What is a primary key in the context of an RDBMS ?
- A.
A unique identifier for a table
- B.
A foreign key that references another table
- C.
A non-unique identifier for a table
- D.
A column that stores encrypted data
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Correct answer: A
A primary key is a unique identifier for rows within a table, enforcing entity integrity.