Question

Define Foreign key with example

Answer 1

A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables. It acts as a cross-referencebetween tables because it references the primary key of another table, thereby establishing a link between them.

Answer 2

in the context or rational database , a foregin key is a feild ( or collection of feilds) in one table that uniquely identify a row of another table or the same table.

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