Query Course
Query Course builds expert SQL skills for real tech environments using an online learning platform example. Learners design schemas, perform safe data updates, develop robust reports, and optimise indexes to ensure precise analytics and dependable operations across production systems.

from 4 to 360h flexible workload
valid certificate in your country
What will I learn?
Query Course equips you with skills to craft strong database schemas, write accurate SQL queries, and create dependable reports for practical learning systems. Gain expertise in joins, aggregations, window functions, subqueries, and date filtering, while learning to boost speed through indexing, EXPLAIN analysis, and materialized views. It also teaches secure updates, deletes, transactions, and polished SQL outputs ready for review in data-heavy setups.
Elevify advantages
Develop skills
- Safe SQL updates and deletes to safeguard live data in active systems.
- Reporting queries for tech platforms including leaderboards, revenue, and usage reports.
- Relational schema design for users, courses, payments, and progress tracking.
- SQL performance optimisation with indexes and efficient query patterns for quick insights.
- Production SQL deliverables featuring clean DDL, test data, and review-ready 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 workloadWhat our students say
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