SQL Performance Tuning
Free Advanced course · 10 lessons · 4 weeks · Certificate on completion
Read query plans and make slow analytical and transactional queries fast. Across 10 lessons you'll move from fundamentals to a portfolio-ready outcome — at your own pace, with quizzes after each lesson and a final exam to certify your mastery.
What you'll learn
- How a query is executed
- Reading EXPLAIN plans
- Indexes that help
- Join algorithms
- Avoiding full scans
- Window function cost
Skills you'll pick up
- How a query is executed
- Reading EXPLAIN plans
- Indexes that help
- Join algorithms
- Avoiding full scans
- Window function cost
Tools covered
- SQL Performance
- Real-world projects
- Quizzes
- Final exam
Course modules
Module 1: How a query is executed
Module 1 of SQL Performance Tuning. 3 lessons · 3h
Module 2: Join algorithms
Module 2 of SQL Performance Tuning. 3 lessons · 3h
Module 3: CTEs vs subqueries
Module 3 of SQL Performance Tuning. 2 lessons · 2h
Module 4: Partition pruning
Module 4 of SQL Performance Tuning. 2 lessons · 2h
Lessons in this course
- How a query is executed
- Reading EXPLAIN plans
- Indexes that help
- Join algorithms
- Avoiding full scans
- Window function cost
- CTEs vs subqueries
- Statistics and estimates
- Partition pruning
- Case: a 10-minute query to 2 seconds
Instructor
Mei Chen — BI & Analytics Manager
Mei Chen is a BI & Analytics Manager with years of hands-on experience teaching SQL Performance to thousands of learners worldwide.
Certificate
Finish every lesson and pass the final exam to earn a free, verifiable Learnera certificate for SQL Performance Tuning. It can be downloaded as a PDF and shared on LinkedIn.
Career outcomes
Median global salary $135,000 per year · median India salary ₹18,90,000 per year · 20,833 open roles worldwide
- SQL Performance Specialist
- Senior SQL Performance Lead
- SQL Performance Consultant
Frequently asked questions
Is the SQL Performance Tuning course free?
Yes. Every Learnera course, including SQL Performance Tuning, is completely free — lessons, quizzes, the final exam, and the certificate.
How long does SQL Performance Tuning take?
10 lessons, typically completed in 4 weeks at a comfortable pace.
Do I get a certificate?
Yes — pass the final exam and you receive a free, verifiable certificate you can share on LinkedIn.