In terms of mere content and my personal interest in the topic, five stars. One star subtraction for the sometimes clunky English at the test sections that made it a bit hard to understand what the exact question really refers to. Neither the instructor, nor me are English native speakers, so I am forgiving to some extentm but written questions in a test should be stated in proper language. On some occasions, I would have appreciated a deep dive into the technicalities a little further: more complex explain plans, specific hints etc.

He does cover the foundational and important aspects of the topic, so if you are looking for beginner-level course, then this might be acceptable, but be aware it only scratches the surface of this very wide and complex topic. Moreover, the instructor's delivery is sometimes unclear, which makes it difficult to follow along and his PowerPoint slides contain errors. Overall, the course falls short in presentation and the content is light, but for someone new to the topic, just dipping her/his toes in the water, this will cover some of the main and areas and could serve as a good introduction.

As a DBA managing multi-terabyte databases, I'm constantly fighting performance fires. This course provided practical, actionable solutions. The modules on indexing strategies and how to evaluate actual index usage were phenomenal. The "before and after" execution plan comparisons were incredibly insightful, making it easy to see the tangible impact of each tuning technique. I can now proactively tune queries instead of just reacting to user complaints. This is an essential course for any Oracle DBA

As an application developer, the database was often a "black box." This course demystified it completely. I finally understand how to read an execution plan and identify bottlenecks like full table scans. The lessons on choosing appropriate data types and creating simple, effective indexes have already had a huge impact on my application's responsiveness. The step-by-step demonstrations made a complex topic feel very accessible. I now feel confident collaborating with our DBAs.

My complex analytical queries for our applications were a constant bottleneck. This course taught me to think about performance from the start. Understanding query compilation and how the optimizer truly uses indexes was a game-changer. I particularly loved the deep dive into Materialized Views for our reporting tables. Seeing the query cost drop dramatically in the before-and-after demos was so satisfying. My code is more efficient, and I spend less time refactoring now.

As a data analyst, waiting for queries to run was my biggest frustration. This course was exactly what I needed. The module on Materialized Views was a revelation for our slow-running daily reports. I also learned how to properly structure my queries with Common Table Expressions (CTEs) to help the optimizer. The practical, hands-on approach meant I could immediately apply these techniques to my own work. My productivity has skyrocketed.

As someone who's always looking to improve query performance, this course was exactly what I needed. The detailed explanation of query execution before and after optimization was incredibly useful. Now, I feel much more confident tuning SQL queries to handle large data sets.

Great course for anyone looking to boost their Oracle SQL performance skills. The clear explanations and practical examples helped me get a good grasp of indexing and materialized views. It’s made a noticeable difference in the performance of my queries.

This course provided a thorough breakdown of query performance tuning in Oracle. The use of real-world examples and the focus on practical skills made a huge difference in how I approach query optimization. I’ve already seen improvements in my reports!

A game-changer for query optimization! This course dives deep into Oracle SQL performance tuning with practical, step-by-step demonstrations. The focus on indexing and materialized views was incredibly useful. Highly recommend for DBAs and developers.

Excellent course for anyone working with Oracle databases! The topics covered, like query compilation and common table expressions, were very clear. The hands-on demonstrations helped me get a better grasp on optimizing queries efficiently.

Before this course, I often struggled with slow queries, but now I have a clear methodology for optimizing them. The course covers everything from query compilation to choosing the right data types for columns. Very comprehensive.

Valuable and insightful. This course transformed how I approach query performance. The focus on practical learning and real-world applications made it stand out. Highly recommend for anyone working with Oracle databases.

I took this course to enhance my skills in Oracle SQL, and it didn’t disappoint. It really helped me understand why queries slow down and how to fix them. The practical approach makes it easy to grasp complex concepts.

Highly recommended for DBAs and developers. This course dives deep into query optimization and index management. I loved how it explained performance tuning techniques in a real-world context, making it easy to apply.

I’ve been a DBA for several years, but this course offered me new insights into query performance tuning. The section on materialized views and indexing gave me strategies I can immediately apply. Worth the time!

Fantastic course! The lessons on indexes and their impact on query performance were eye-opening. I now understand how to fine-tune my queries and reduce bottlenecks. The course was detailed, yet easy to follow.

Practical and impactful. The course provides hands-on techniques to tackle slow query execution. The before-and-after tuning examples were eye-opening and helped me understand optimization methods clearly.

I've been working with Oracle databases for years, but this course took my skills to the next level. The step-by-step demonstrations really helped me understand how to optimize queries effectively

Great focus on real-world scenarios. The course addresses common issues like slow report generation and offers actionable solutions. The materialized views section was particularly insightful