Catch breaking schema changes in every PR with the free SchemaLens GitHub Action.

SQL Schema Dependency Analyzer

Discover foreign-key relationships, view dependencies, circular references, and the safest order to run your migrations. Paste your DDL below — everything stays in your browser.

Paste CREATE TABLE / CREATE VIEW / ALTER TABLE statements

Keep dependencies under control in CI/CD

SchemaLens diffs schemas in every pull request, flags breaking changes, and generates safe migration SQL. Add the free GitHub Action or generate a config for GitLab, Jenkins, CircleCI, Bitbucket, or Azure DevOps.

Generate an ER diagram · SQL to Mermaid ERD · Pre-commit hook

SQL Schema Dependency Analyzer

Dependency Analysis

Safe migration order (topological sort)

Dependencies by table

Export

Keep dependencies under control in CI/CD