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Computer Science for IGCSE & O level - Databases (Section 5 - No. 50)

What is a foreign key?
The primary key of the current table.
A key that uniquely identifies a record.
A field in a table that references the primary key of another table.
A key used for data encryption.

توضيح

A foreign key establishes a link between tables by referencing the primary key in another table.

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