Question

define the primary key!!​

Answer 1

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 constitute a single attribute: a unique ID.

Answer 2

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

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