Question

The _____ is a key used to distinguish specific records from the other records. [ ] *​

Answer 1

The primary key is a key used to distinguish specific records from the other records.

• It is an unique keyword in relational database which is used to uniquely identify a record.

• Each database should be having only one primary key.

• The choice of such an unique keyword depends on the administrator and it can be changed as and when required.

Answer 2

"Primary key " is the correct choice.

Explanation:

This is indeed a special keyword throughout the relational database being used specifically or uniquely to classify a document. Every database should have only a single primary key.

The prominent components of the primary key seem to be:

• This should represent a special value for every data row.
• It could not hold any null values.

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