Comprehensive SQL Databases Course
This course equips you with advanced SQL skills for subscription-based systems. Learn to design schemas, craft complex queries, optimise indexes, and develop production-ready databases that drive invoicing, MRR/ARR reports, support metrics, and efficient tech applications. Perfect for building robust data solutions in real-world scenarios.

4 to 360 hours flexible workload
valid certificate in your country
What will I learn?
Gain expertise in SQL for subscription data management through this practical course. Design effective schemas, implement strict constraints, and create reliable CREATE TABLE statements. Develop optimised queries for MRR, ARR, active subscriptions, overdue payments, and key metrics, while optimising indexes, handling migrations, generating test data, and ensuring data integrity for accurate reporting and analysis.
Elevify advantages
Develop skills
- Advanced SQL analytics: create complex MRR, ARR, and ageing reports efficiently.
- Production-ready schema design: structure subscription data using normalised 3NF tables.
- Strong constraints and keys: apply business rules via foreign keys, checks, and unique constraints.
- Performance-focused indexing: optimise queries with composite and covering indexes.
- Secure data seeding: produce realistic anonymised test data using bulk insert methods.
Suggested summary
Before starting, you can change the chapters and the workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.What our students say
Your classes are perfect. I got the one-year package and finally have the chance to follow a range of topics I'm interested in without having to switch platforms... thank you for everything you do, I've already recommended you to others...

Giulio CarloDigital Marketing Student
I like how the lessons get straight to the point and how I can switch chapters and skip content I don't need.

Mariana FerresPhotography Student
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Luciana AlvarengaNail Design Student
The platform is fast and easy to use. The variety of content and the extra videos really help with learning.

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