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AI SQL Schema Comparator

Compare two schemas and get AI-generated migration and rollback scripts.

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A Developer's Guide to the AI SQL Schema Comparator

The AI SQL Schema Comparator is an indispensable tool for managing database schema changes. It compares two versions of a SQL schema and automatically generates the DDL (Data Definition Language) scripts needed to migrate from the old version to the new one, as well as a script to roll back the changes.

Features

  • Intelligent Schema Diffing: The AI analyzes two schemas and identifies all changes, including:
    • New or dropped tables, columns, and indexes.
    • Modified columns (data type changes, nullability, etc.).
    • Changes to constraints and foreign keys.
  • Bi-directional Script Generation: The tool provides two critical scripts:
    • Migration Script: The ALTER TABLE, CREATE TABLE, etc. commands to upgrade Schema A to Schema B.
    • Rollback Script: The inverse commands to downgrade Schema B back to Schema A.
  • Clear Summary: Get a human-readable, bulleted list of all the changes detected between the two schemas.
  • Multi-Dialect Support: Generate scripts with the correct syntax for popular databases like PostgreSQL, MySQL, T-SQL, and more.

How to Use

  1. Provide Both Schemas:
    • Paste your original schema into the "Schema A (Original)" editor.
    • Paste your new, target schema into the "Schema B (New)" editor.
  2. Select Your Dialect: Choose your database system from the dropdown menu.
  3. Generate: Click the "Compare Schemas" button.
  4. Review and Use the Scripts:
    • Summary Tab: Get a quick overview of what changed.
    • Migration Script Tab: Copy this script to apply your update.
    • Rollback Script Tab: Save this script in case you need to revert the changes.