Query Course
Query Course Mastery builds your SQL prowess for real tech setups. Through a case study on online learning platforms, you'll design schemas, execute safe updates, create robust reports, and optimise indexes to ensure precise analytics and dependable data handling in production.

flexible workload from 4 to 360h
valid certificate in your country
What will I learn?
This course equips you with skills to craft strong database schemas, write accurate SQL queries, and develop dependable reports for practical learning systems. You'll gain expertise in joins, aggregations, window functions, subqueries, and date filtering, while learning to boost efficiency through 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 systems.
- Craft reporting queries for tech platforms like leaderboards, revenue, and usage dashboards.
- Design relational schemas for users, courses, payments, and progress tracking.
- Optimise SQL performance with strategic indexes and efficient query patterns.
- Produce production-grade SQL including clean DDL, test data, and reviewable queries.
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
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