Migrations

Migrations are a version control system for database schemas that allow developers to manage and apply incremental changes to a database structure over time. They enable teams to evolve the database schema in a controlled, reproducible manner, typically using code-based scripts that define changes like creating tables, adding columns, or modifying constraints. This concept is widely implemented in frameworks and tools to support database evolution alongside application code changes.

Also known as: Database Migrations, Schema Migrations, DB Migrations, Migration Scripts, Schema Evolution

Why learn Migrations?

Developers should learn and use migrations to ensure database schema changes are tracked, reversible, and consistent across different environments (e.g., development, staging, production). They are essential for collaborative development, as they prevent schema drift and enable automated deployment pipelines, reducing manual errors. Common use cases include initializing databases for new applications, updating schemas for new features, and rolling back changes in case of issues.

Learning Resources

• docs: Database Migrations Explained - Atlassian
• docs: Laravel Database Migrations Documentation
• tutorial: Django Migrations Tutorial - Real Python
• tutorial: Database Migrations with Flyway - Baeldung
• video: Introduction to Database Migrations - YouTube