Database Migration Patterns

Best practices for safe database schema migrations.

Migration File Structure

migrations/
├── versions/
│   ├── 001_initial_schema.py
│   ├── 002_add_users_table.py
│   ├── 003_add_user_email_index.py
│   └── 004_add_orders_table.py
├── alembic.ini
└── env.py

Alembic Migration Template