What is a primary key in the context of an RDBMS ?

2024

Answer: A. A unique identifier for a table — A primary key is a unique identifier for rows within a table, enforcing entity integrity.

1. A.

   A unique identifier for a table

2. B.

   A foreign key that references another table

3. C.

   A non-unique identifier for a table

4. D.

   A column that stores encrypted data

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