Master Database Schema Migrations in 7 Days

A free email course for backend developers who ship schema changes to production. One actionable lesson per day. No spam. Unsubscribe anytime.
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What You'll Learn

7 lessons. Zero fluff. Everything you need to ship schema changes safely.

DAY 1

The 5-Minute Schema Review

How to catch breaking changes before they ship. A simple checklist that catches 90% of migration mistakes in under 5 minutes.

Breaking Changes · Risk Scoring
DAY 2

Zero-Downtime Patterns

The expand/contract pattern, blue/green deploys, and how to add columns without locking tables. Copy-paste ready for PostgreSQL, MySQL, and SQL Server.

Online Schema Changes · Lock Avoidance
DAY 3

The 12 Changes That Break Production

Column drops, type narrowing, NOT NULL without defaults, missing index drops — the real-world breaking changes that caused outages.

Outage Prevention · Real Examples
DAY 4

Rollback Strategies That Work

How to undo a bad migration safely. Reverse ALTER TABLE scripts, backup strategies, and when to reach for pg_dump or mysqldump.

Reverse Migrations · Disaster Recovery
DAY 5

CI/CD Schema Diff Integration

Automate schema comparison in every pull request. GitHub Actions, GitLab CI, and pre-commit hooks that catch drift before merge.

GitHub Actions · Automation
DAY 6

Team Workflows at Scale

How teams review schema changes without bottlenecking deploys. PR templates, approval workflows, and the "schema change RFC" pattern.

Code Review · Team Process
DAY 7

Your Migration Safety Checklist

A 25-point printable checklist you can use before every deploy. Plus: how to build a culture of safe migrations on your team.

Checklist · Team Culture

Built by the team behind SchemaLens. We've analyzed 10,000+ schema diffs across PostgreSQL, MySQL, SQLite, SQL Server, and Oracle to distill the patterns that actually prevent outages.

Want to automate everything you just learned?

SchemaLens Pro generates migration scripts, detects breaking changes, and exports diff reports — all in your browser. No CLI required.

Get SchemaLens Pro — $39 Lifetime

Frequently Asked Questions

Is this course really free?

Yes. 100% free. No credit card required. No hidden upsells. We send one email per day for 7 days.

What skill level is this for?

Intermediate backend developers who work with SQL databases and ship schema changes to production. If you write ALTER TABLE statements, this is for you.

Which databases are covered?

PostgreSQL, MySQL / MariaDB, SQLite, SQL Server, and Oracle. Most patterns apply to all dialects; where they differ, we show the specific syntax.

Can I share this with my team?

Absolutely. Forward the emails, share the landing page, or print the Day 7 checklist for your team wiki.

How do I unsubscribe?

Every email has a one-click unsubscribe link at the bottom. No questions asked.