Lesson 32: Add & Remove Foreign Key in PostgreSQL ALTER TABLE Guide
In this lesson, you will learn how to use the ALTER TABLE command in PostgreSQL to add and remove Foreign Key constraints in existing tables.
A Foreign Key is used to create a relationship between two tables and ensure that the data stays consistent. You will see how to add a foreign key to link a column with another table, and how to remove it when it is no longer needed.
By the end of this lesson, you will understand how to manage table relationships step by step and maintain data integrity in a simple and practical way.