Comprehensive SQL Databases Course
This course equips you with SQL skills for subscription-based systems. Learn to design schemas, craft advanced queries, optimise indexes, and set up production databases that support invoicing, MRR/ARR reports, support metrics, and high-performance applications. Ideal for building robust data solutions in real-world tech environments.

flexible workload of 4 to 360h
valid certificate in your country
What will I learn?
Gain expertise in SQL for subscription data management through this practical course. You will create strong database schemas, apply strict constraints, and develop reliable CREATE TABLE scripts. Master efficient queries for MRR, ARR, active subscriptions, overdue payments, and support metrics, along with index optimisation, migration handling, realistic test data generation, and data validation for accurate reporting and analysis.
Elevify advantages
Develop skills
- Advanced SQL analytics: Quickly create complex MRR, ARR, and ageing reports.
- Production-ready schema design: Structure subscription data using clean 3NF tables.
- Strong constraints and keys: Implement business rules via foreign keys, checks, and unique constraints.
- High-performance indexing: Optimise queries using composite and covering indexes.
- Secure data seeding: Produce realistic anonymised test data with 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
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Giulio CarloDigital Marketing Student
I like how the lessons are straight to the point and how I can switch chapters and skip content I don't need.

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The platform is fast and easy to use. The variety of content and the supplementary videos really help with learning.

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