Does this tool connect to my database?

No. It compares two DDL schema texts locally and generates migration SQL. Nothing is executed against a live database.

Which dialects are supported?

PostgreSQL, MySQL, and SQLite CREATE TABLE syntax. Complex vendor-specific features may need manual review after generation.

Why are DROP statements highlighted?

Dropping tables or columns is destructive and irreversible. The tool flags DROP operations so you review them before running migrations in production.

DB Migration Script Generator

Compare two CREATE TABLE schemas and generate ALTER, CREATE, and DROP migration SQL.

Quick start

Dialect

Old schema

New schema

How to Generate Database Migration Scripts from DDL Diffs

Compare old and new CREATE TABLE schemas and generate PostgreSQL, MySQL, or SQLite ALTER and DROP migration SQL online — with destructive change warnings.