Definitions for "Foreign Key"
A foreign key is the primary key from a different table.
A column or columns in a table that match the primary key in another table.
Integrity constraint that requires each value in a column or set of columns to match a value in a related table's UNIQUE or PRIMARY KEY. FOREIGN KEY integrity constraints also define referential integrity actions that dictate what Oracle should do with dependent data if the data it references is altered. See Also: integrity constraint, primary key