Foreign Key and Referential Integrity. All you need to know.
#referentialintegrity #foreignkey #datascience #database #dbms #dbmstutorials #sql #mysql #computerscience
Foreign Key is an attribute (or a set of attributes) that refers to the Primary Key of another table.
In this video, we discuss the following topics:
0:00 What is a Foreign Key?
0:59 Why do we use Foreign Keys?
1:34 Referential Integrity.
4:55 How to create a Foreign Key?
6:47 When to use Foreign Key?
7:55 Additional Notes on Foreign Key.
