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A foreign key is a set of one or more columns in any table (not necessarily a candidate key, let alone the primary key, of that table) which may hold the value(s) found in the primary key column(s) of some other table.
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www.aisintl.com/case/primary_and_foreign_key.html
www.aisintl.com/case/primary_and_foreign_key.html
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Introduces the concept of foreign key. ... A foreign key is a field (or fields) that points to the primary key of another table. The purpose of the foreign key is to ensure referential integrity of the data. In other words, only values that are supposed to appear in the database are permitted.
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www.1keydata.com/sql/sql-foreign-key.html
www.1keydata.com/sql/sql-foreign-key.html
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A foreign key links a record in one database table to a record in another table. A foreign key is a field (or fields) in one table that must exactly equal the primary key field (or fields) in another table. When the values match the records can be combined in a query.
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orion.kent.edu/steinberg/forkey.htm
orion.kent.edu/steinberg/forkey.htm
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www.infj.ulst.ac.uk/~ccjg23/medical_informatics/lecture...
www.infj.ulst.ac.uk/~ccjg23/medical_informatics/lecturenotes/lectures/ianyoung/wk2_dbtheory/sld014.htm
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What is a foreign key? Find out here! ... Definition: A foreign key is a field in a relational table that matches the primary key column of another table. The foreign key can be used to cross-reference tables.
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databases.about.com/cs/specificproducts/g/foreignkey.ht...
databases.about.com/cs/specificproducts/g/foreignkey.htm
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Foreign key - Definition of Foreign key at Dictionary.com a free online dictionary with pronunciation, synonyms, and translation of Foreign key. Look it up now! ... foreign key database; A column in a database table containing values that are also found in some primary key column (of a different table). By extension,
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dictionary.reference.com/browse/Foreign%20key
dictionary.reference.com/browse/Foreign%20key
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InnoDB supports foreign key constraints. The syntax for a foreign key constraint definition in InnoDB looks like this: ... index_name represents a foreign key ID. If given, this is ignored if an index for the foreign key is defined explicitly. Otherwise, if InnoDB creates an index for the foreign key, it uses index_name...
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dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-cons...
dev.mysql.com/doc/refman/5.0/en/innodb-foreign-key-constraints.html
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Foreign trade; Premier online Business to business guide for foreign trade provides free trade opportunities posted by worldwide importers, exporters, manufacturers, wholesale distributors and more.
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www.tradekey.com/c_Foreign-trade/
www.tradekey.com/c_Foreign-trade/
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