![]() To Create a Foreign Key Constraint in MySQL, we require the following things ![]() ![]() How to Create Foreign Key Constraint in MySQL? In our upcoming articles, we will discuss referential integrity constraints in detail. The foreign key constraints are basically used to enforce referential integrity. Note: A foreign key in one TABLE points to either a primary key or a unique key in another table in MySQL. That means the Foreign Key constraint in MySQL is used for binding two tables with each other and then verify the existence of one table data in other tables. In order to create a link between two tables, we must specify a Foreign Key in one table that references a column in another table. The relationship between multiple tables provides a mechanism for linking the data stores in multiple tables and retrieving them in an efficient manner. What is a Foreign Key Constraint in MySQL?Ĭreating the relationship between the database tables is one of the most important concepts in a database. Please read our previous article where we discussed the Primary Key Constraint in MySQL with examples before proceeding to this article. In this article, I am going to discuss the Foreign Key Constraint in MySQL with Examples.
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