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Summary: in this tutorial, you will learn about the MySQL Foreign Key constraint and how to create, drop and disable a foreign key constraint. MySQL Foreign Key Introduction. A foreign key is a column (or set of columns) that establishes a relationship between data in two tables.
In this video, learn Primary Key and Foreign Key in MySQL Explained with Examples | MySQL Tutorial. Find all the videos of the MySQL Full Course in this play...
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This tutorial introduces you to MySQL foreign key constraints and shows you how to manage foreign keys effectively.
The FOREIGN KEY constraint is used to prevent actions that would destroy links between tables. A FOREIGN KEY is a field (or collection of fields) in one table, that refers to the PRIMARY KEY in another table.
How to declare a table with a foreign key in MySQL. To create a table with a FOREIGN KEY constraint, you denote the foreign key and the primary key that it references. The following code creates a table containing a foreign key:
A FOREIGN KEY (FK) is used to impose database integrity. A FOREIGN KEY is a key used to link two tables (table of Primary key and table of Foreign Key) toge...
