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Which of the following identifies a row within a relational database and is used for indexing?

Which of the following identifies a row within a relational database and is used for indexing?

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A.
Foreign key

B.
Primary key

C.
Cell

D.
Tuple

Explanation:
The primary key is an identifier of a row and is used for indexing inrelational databases. Each row must have a unique primary key to properly represent the row as one entity. When a user makes a request to view a record, the database tracks this record by its unique primary key.


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