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Definition of "Foreign Key" |
In the context of relational databases, a foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table. In other words, a foreign key is a column or a combination of columns that is used to establish and enforce a link between two tables.The table containing the foreign key is called the referencing or child table, and the table containing the candidate key is called the referenced or parent table. |
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