A foreign key is a data field in the records of one table that references a primary key in the records of another table.

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Quizplus · Accepted Answer

A foreign key in a database is indeed a field (or collection of fields) in one table that uniquely identifies a row of another table or the same table, typically linking two tables together by referring to the primary key of another table, thereby establishing a relationship between the tables.

A Foreign Key Is a Data Field in the Records