What Is a Foreign Key in Databases?

A foreign key is a rule that links two tables in a relational database by matching values.

In this short video, you’ll learn:
• What a primary key is
• How to create a foreign key
• Why foreign keys are essential for data integrity
• What happens when you try to insert invalid data

Ideal for beginners working with SQL, ER diagrams, or relational modeling.

#SQL #ForeignKey #DatabaseDesign #DataModeling #DbSchema #RelationalDatabases

Видео What Is a Foreign Key in Databases? канала DbSchema Database Designer