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

SQL Schema Complexity Scorer

Measure how complex your database schema really is. Paste your DDL to get a 0-100 score, detailed metrics, risk factors, and actionable recommendations — everything stays in your browser.

Paste CREATE TABLE / CREATE INDEX / CREATE VIEW / CREATE TRIGGER / ALTER TABLE statements

Keep schema complexity from turning into production incidents

SchemaLens diffs schemas in every pull request, flags breaking changes, and generates migration SQL. Add the free GitHub Action or analyze your schema dependencies.

Generate an ER diagram · Pre-commit hook · Schema change checklist

SQL Schema Complexity Scorer

Complexity Score

Factor breakdown

Risk factors

Recommendations

Export

Keep schema complexity from turning into production incidents