What is a FOREIGN KEY ?

[RitaRankin]

A foreign key is a relationship between two tables in a database.It acts as a cross-reference between tables because it references the primary key of another table, thereby establishing a link between them.

 

[JamieD1234]

This was very insightful! Thanks so much.

 

[AngelaPender]

A foreign key is a relationship between two tables in a database.The values of foreign key column are derived from the column of different table especially which are defined as primary key or unique key.

 

[abhaybhatia]

A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables.

 

[bleukitchens]

A FOREIGN KEY is a key used to link two tables together.

 

[jeevanrahi]

A foreign key is an attribute that completes a relationship by identifying the parent entity. Foreign keys provide a method for maintaining integrity in the data and for navigating between different instances of an entity.

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[Ankur sood]

A foreign key is a key used to link two tables together. This is sometimes also called as a referencing key.

A Foreign Key is a column or a combination of columns whose values match a Primary Key in a different table.

The relationship between 2 tables matches the Primary Key in one of the tables with a Foreign Key in the second table.

 

[kyotobaths]

A foreign key is a key used to link two tables together. This is sometimes also called a referencing key.

 

[indiakidneyhospital]

Thanks for sharing with us