SQL Joins and Subqueries Course
Master SQL joins, subqueries, CTEs, and window functions to build fast, reliable reports. Learn indexing, time-based filtering, and SaaS data modeling so you can debug queries, optimize performance, and ship production-ready analytics.

4 to 360 hours of flexible workload
valid certificate in your country
What Will I Learn?
Master SQL joins, subqueries, and CTEs to write fast, reliable reporting queries in this focused course. You will learn advanced join types, anti-join patterns, window functions, and Top-N ranking, plus indexing and EXPLAIN ANALYZE for performance tuning. Practice time-based filtering, date arithmetic, and timezone handling while building clear, reusable SQL for accurate, production-ready analytics.
Elevify Differentials
Develop Skills
- High-performance joins: Tune indexes, plans, and timeouts for fast SQL reporting.
- Advanced subqueries and CTEs: Build clear, reusable logic for complex analytics.
- Window functions and Top-N: Rank, segment, and aggregate large datasets with ease.
- Time-based filtering mastery: Write accurate, timezone-aware date and event queries.
- Clean, maintainable SQL: Enforce naming, validation, and documentation best practices.
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 classes are perfect. I purchased the one-year package and finally have the opportunity to follow various topics of my interest without needing to switch 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 switch chapters and skip content I don't need.

Mariana FerresPhotography Student
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The platform is fast, simple to use. The diversity of content and complementary videos really help with learning.

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