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  1. #31
    Senior Member
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    Sep 2016
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    Kolkata
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    Re: What is a FOREIGN KEY ?

    A foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table or the same table.

  2. #32
    Senior Member
    Join Date
    Jul 2016
    Location
    Haslet TX
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    187

    Re: What is a 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 or the same table. In simpler words, the foreign key is defined in a second table, but it refers to the primary key in the first table.

 

 
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