Question

what is primary key in one line answer



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Answer 1

Answer:

Here is your answer

Explanation:

In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation. Informally, a primary key is "which attributes identify a record", and in simple cases are simply a single attribute: a unique id.

Answer 2

Explanation:

A primary key, also called a primary keyword, is a key in a relational database that is unique for each record.