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SQL Course

SQL Course
from 4 to 360h flexible workload
valid certificate in your country

What will I learn?

This SQL Course teaches you how to design and optimise relational schemas for subscription billing, configure major database engines, and implement strong constraints for accurate monetary data. Learn to populate realistic test data, run analytical queries for recurring revenue and overdue invoices, and maintain performance with indexing, safe migrations, and cleanup strategies in a concise, practical format.

Elevify advantages

Develop skills

  • Design robust billing schemas: model subscriptions, invoices, and payments fast.
  • Optimise SQL performance: build smart indexes and read explain plans with ease.
  • Enforce data integrity: apply keys, constraints, and safe cascade delete rules.
  • Generate realistic test data: seed subscription, invoice, and payment scenarios quickly.
  • Build analytical SQL reports: MRR, churn, overdue invoices, and top-paying customers.

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.
Workload: between 4 and 360 hours

What our students say

Your classes are perfect. I purchased the one-year package and finally have the chance to follow several topics I'm interested in without having to switch platforms... I appreciate everything you do, I've already recommended you to others...
Giulio Carlo
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.
Mariana Ferres
Mariana FerresPhotography Student
I like the content and the way the videos are presented and transcribed, which speeds up the process!
Luciana Alvarenga
Luciana AlvarengaNail Design Student
The platform is fast and easy to use. The variety of content and the extra videos really help with learning.
Giulio Carlo
Giulio CarloPrompt Engineering Student

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