The Django Migration system is a built-in tool that helps manage database schema changes over time. It allows developers to define the changes that need to be made to the database in code, and then apply those changes to the database. This is useful for automating database migrations and ensuring that all developers on a project are working with the same version of the database.

For example, if you want to add a new field to an existing table, you can define the new field in your migration code. The Django Migration system will then generate a SQL statement that adds the new field to the database. It will also add the necessary triggers and constraints to ensure that the data in the new field is valid.

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