Obtaining SQL Developer (SQLD) Certification (2024 Revision) Part.3 Bottom

This course is designed to systematically teach advanced SQL features, specifically GROUPING functions and Window functions, to prepare for the SQLD exam and enhance practical data analysis skills. You will learn the concepts and applications of GROUPING functions and master methods for analyzing data at various aggregation levels. Understand the basic concepts and types of **Window functions (based on the OVER keyword)** and improve your practical skills through hands-on exercises. Learn **Ranking functions (RANK, DENSE_RANK, ROW_NUMBER, etc.)** and window options for aggregate functions through practical business examples. Cover **Row order functions (LAG, LEAD, FIRST_VALUE, LAST_VALUE, etc.)** and practice time-series and sequence-based analysis firsthand. 👉 Through this course, learners can expand their data aggregation and analysis skills to an advanced level, gaining expertise that is immediately applicable not only to the SQLD exam but also to real-world corporate data analysis environments.