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Which of these is a column in one table that references the primary key of another table, thus providing a link between two tables?
Secondary key
Foreign key
Candidate key
Composite key
The correct answer is foreign key. A foreign key provides a link between two tables. A composite key is a combination of two or more columns in a table that can be used to uniquely identify each row in the table. A candidate key is a column that can uniquely identify a database record without referring to any other data. A secondary key is an alternative primary key.
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