MySQL ALTER TABLE Command - Complete Tutorial
Quick Answer
The MySQL ALTER TABLE command is used to modify the structure of an existing table, such as adding or dropping columns, changing data types, or renaming columns and tables. It allows database administrators and developers to update table schemas without losing data.
Learning Objectives
- Understand the purpose and syntax of the ALTER TABLE command in MySQL.
- Learn how to add, drop, and modify columns in an existing table.
- Practice renaming columns and tables using ALTER TABLE.
Introduction
In MySQL, the ALTER TABLE command is a powerful Data Definition Language (DDL) statement used to modify the structure of existing tables.
Whether you need to add a new column, remove an unused one, or change a column's data type, ALTER TABLE lets you do this without recreating the table.
Modify your tables without losing data.





