Comprehensive SQL Databases Course
Become proficient in SQL for subscription-based systems. Build schemas, craft advanced queries, optimise indexes, and develop ready-to-use databases supporting billing, MRR/ARR reports, support data, and efficient tech apps. This course equips you with hands-on skills for production environments, ensuring reliable performance and data integrity across real-world scenarios.

from 4 to 360h flexible workload
valid certificate in your country
What will I learn?
Gain expertise in SQL using practical subscription datasets in this focused, practical course. Craft strong database structures, set strict rules, and create reliable CREATE TABLE scripts. Develop fast queries for MRR, ARR, active subs, late payments, and help metrics, plus optimise indexes, handle updates, add real test data, and ensure data accuracy for solid reports and analysis.
Elevify advantages
Develop skills
- Advanced SQL analysis: quickly create complex MRR, ARR, and overdue reports.
- Production schema design: structure subscription info in clean 3NF tables.
- Strong constraints and keys: apply business logic via foreign keys, checks, uniques.
- Performance indexing: speed up queries using composite and covering indexes.
- Secure data seeding: produce realistic anonymised test data via bulk inserts.
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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