Mastering Window Functions in MySQL is a powerful skill for any developer working with data. Window functions allow you to perform complex calculations across sets of table rows related to the current row without collapsing the result into a single value. This ability makes window functions particularly useful for data analysis, reporting, and various applications in real-time systems. In this article, we'll explore the essential techniques to effectively use window functions in MySQL, with code examples, demos, and results that demonstrate their power.