Generate migration

Generate ordered SQL migration steps with optional rollback statements.

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ToolMigration Generator
Input
Output
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Preview

How it works

Requested add, rename, alter, drop, index, and constraint operations become ordered up statements with optional down statements. The generated text does not inspect the live database schema.

  • Separate directions make review and rollback intent visible.
  • Operation order follows known dependencies.

Worked example

Add Email Column Migration
Generate a migration to add an email column to the users table
Input
											Name: add_email_to_users
Actions: [{"action":"add_column","table":"users","column":"email","type":"VARCHAR(255)","nullable":false}]
Output
												-- Migration: add_email_to_users
-- Generated: 2026-08-25T12:45:14.702Z

-- Up Migration
BEGIN;

ALTER TABLE users ADD COLUMN email VARCHAR(255) NOT NULL;

COMMIT;

-- Down Migration (Rollback)
BEGIN;

ALTER TABLE users DROP COLUMN email;

COMMIT;

When to use this

Deployment pipelines, schema reviews, and release notes generate migrations.

Edge cases

  • Dropping a column can destroy data before rollback.
  • A new non-null column needs a default or staged backfill.
  • A down migration can fail after irreversible data changes.

References