In a relational database, what is a primary key?

2025

Answer: B. A unique identifier for a record in a table — A primary key uniquely identifies each record in a table. Step 2: It ensures no duplicate entries exist. Step 3: This makes it a valid identifier for database…

1. A.

   A key used for opening encrypted data

2. B.

   A unique identifier for a record in a table

3. C.

   A foreign key from another table

4. D.

   An index for sorting data

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