Introduction to FOREIGN KEY in MariaDB
FOREIGN KEY stands for a column or the set of columns table that creates a foreign key connection to the primary key or unique index in another table. It is important for the basis of referential integrity which ensures data relationships remain consistent across tables.
In MariaDB, a Foreign Key is declared within the structure of a table using the FOREIGN KEY constraint. This restriction defines which columns in the table correspond to primary or unique key columns of another table. Foreign keys enforce referential integrity.
Foreign Key in MariaDB
MariaDB is an open–source database system which is similar to MySQL. It provide various features such as high availability and vertical scalability to allow database to scale up over various nodes or single node as features like Galera Cluster in MariaDB. The Foreign keys are the most important features that help define and establish relationships between tables. In this article, we will what is Foreign Key, its syntax various methods to define a Foreign Key, and examples.
Contact Us