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Blech. These are the grossest words.

foreign key

foreign key in Technology

A column in a database table containing values that are also found in some primary key column (of a different table). By extension, any reference to entities of a different type.
Some RDBMSs allow a column to be explicitly labelled as a foreign key and only allow values to be inserted if they already exist in the relevant primary key column.
[Is it still a foreign key if the primary key is in a different column in the __same__ table?]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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  • In our own language we have a —— nowhere surpassed, in whose lock no foreign key will ever rust.

    English Synonyms and Antonyms James Champlin Fernald

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