1. Install dependencies:
   pip install sqlalchemy alembic pyodbc

2. Initialize Alembic:
   alembic init alembic

3. Update alembic.ini with your connection string:
   sqlalchemy.url = mssql+pyodbc://localhost/TestDB?driver=ODBC+Driver+17+for+SQL+Server&trusted_connection=yes

4. Edit alembic/env.py:
   from models import Base
   target_metadata = Base.metadata

5. Generate migration:
   alembic revision --autogenerate -m "initial"

6. Apply migration:
   alembic upgrade head