SQL Practice: Intermediate Queries Course
This course enhances intermediate SQL skills through hands-on practice on a simulated online education database, covering schema design, query writing, optimization, data handling, and project documentation for professional readiness.

from 4 to 360h flexible workload
valid certificate in your country
What will I learn?
Boost your SQL abilities through targeted, practical exercises on a realistic online education platform database. You'll create normalised tables, produce sample data, and craft intermediate queries involving joins, aggregates, subqueries, and window functions. Master managing null values, using conditional logic, improving performance via indexes, interpreting EXPLAIN plans, and producing a neat, well-documented SQL project suitable for actual work environments.
Elevify advantages
Develop skills
- Design relational schemas: model users, courses, and events for analytics.
- Write intermediate SQL: joins, subqueries, and window functions on real data.
- Optimise SQL performance: add indexes, read EXPLAIN, and tune slow queries.
- Handle nulls and dates: robust CASE logic, safe division, and cohort metrics.
- Generate and document seed data: realistic test sets for fast SQL iteration.
Suggested summary
Before starting, you can change the chapters and workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.What our students say
Your lessons are perfect. I purchased the one-year package and finally have the opportunity to follow various topics of my interest without needing to change platforms... I thank you for everything you do, I've already recommended you to other people...

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

Mariana FerresPhotography Student
I like the content and the way videos are presented and transcribed, which speeds up the process!

Luciana AlvarengaNail Design Student
The platform is fast, simple to use. The diversity of content and complementary videos help a lot with learning.

André FelipePrompt Engineering Student
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