MySQL Tutorial: Modifying Tables with Ease

Need to update your database structure without starting from scratch? This guide shows you exactly how to expand your tables using the ALTER TABLE command.

In this session, we focus on the ADD COLUMN syntax, a fundamental skill for any developer or database administrator looking to scale their applications. Whether you're adding a phone number field or a new user preference, mastering this command ensures your data schema can grow alongside your project.

Key Command Highlight
The image demonstrates how to add a new string-based column to an existing table:

ALTER TABLE users ADD COLUMN phone VARCHAR(20);

ALTER TABLE: Tells MySQL which table you want to change.

ADD COLUMN: Specifies the action (inserting a new field).

VARCHAR(20): Defines the data type and maximum character length.

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