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Which Alembic command applies all pending migrations to the database?

easy🧠 Conceptual Q2 of 15
FastAPI - Database Integration
Which Alembic command applies all pending migrations to the database?
Aalembic revision --autogenerate
Balembic upgrade head
Calembic downgrade base
Dalembic init migrations
Step-by-Step Solution
Solution:

  1. Step 1: Identify command to apply migrations

    To apply all migrations, Alembic uses the upgrade command targeting the latest version.

  2. Step 2: Understand 'head' keyword

    'head' means the latest migration in the versions folder, so upgrade head applies all pending migrations.

  3. Final Answer:

    alembic upgrade head -> Option B

  4. Quick Check:

    Apply migrations = upgrade head [OK]
Quick Trick: Use 'upgrade head' to apply all migrations [OK]
Common Mistakes:
MISTAKES
  • Using revision command to apply migrations
  • Confusing downgrade with upgrade
  • Trying to init migrations to apply changes

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