Question

_____key is used to identify each record in the table​

Answer 1

Answer:

Candidate keys are defined as the minimal set of fields which can uniquely identify each record in a table. It is an attribute or a set of attributes that can act as a Primary Key for a table to uniquely identify each record in that table.

Explanation:

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Answer 2

Answer:

Primary keys

Primary keys

The primary key is a field which uniquely identifies each record in a table in a relational database: It can be pre-existing data, for example National Insurance Number.