Query Course
Dive into advanced SQL mastery with Query Course, tailored for real-world tech applications. Through an online learning platform example, you'll design effective schemas, implement secure data updates, create insightful reports, and optimise performance with indexing—ensuring precise analytics and dependable operations across production systems.

4 to 360 hours flexible workload
valid certificate in your country
What will I learn?
This course equips you with skills to craft robust database schemas, write accurate SQL queries, and develop dependable reporting for practical learning platforms. You'll gain expertise in joins, aggregations, window functions, subqueries, and date filtering, while learning to boost performance via indexing, EXPLAIN plans, and materialized views. It also addresses secure updates, deletes, transactions, and polished SQL outputs ready for review in data-heavy environments.
Elevify advantages
Develop skills
- Secure SQL updates and deletes to safeguard live data in operational environments.
- Develop reporting queries for tech platforms, including leaderboards and revenue metrics.
- Design relational schemas for users, courses, payments, and progress tracking.
- Optimise SQL performance using targeted indexes and efficient query patterns.
- Produce production-grade SQL assets like DDL scripts, sample data, and peer-reviewable queries.
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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