Lesson 26: Add Multiple Columns in PostgreSQL Using ALTER TABLE Step by Step
In this lesson, you will learn how to use the ALTER TABLE command in PostgreSQL to add multiple new columns to an existing table step by step. This is useful when you want to expand your table structure without creating the table again.
You will see how to add two or more columns in one command, choose the correct data types, and organize your table more efficiently. This method saves time and makes table modification easier in real database work.
By the end of this lesson, you will understand how to update an existing table by adding multiple columns in a clean and practical way.