دانلود کتاب ۹۶ چالش رایج در پاور کوئری(Power Query): راهکارهای عملی برای تسلط بر تبدیل داده‌ها در اکسل و پاور بی آی(Power BI)

In this book, each chapter begins with an introduction to key concepts, followed by a series of carefully selected challenges related to the chapter’s topic. For each challenge, I provide step-by-step solutions, along with tips, tricks, and best practices to help you better understand Power Query’s functionality. Whenever multiple logics are possible, I compare them, evaluating performance for larger datasets so that you can choose the most eficient approach for your own use case. Most solutions begin with the Power Query UI, after which you’ll manually modify the generated formula to tailor it for speciic needs and uncover hidden features of Power Query’s M language. While basic familiarity with M will make it easier to follow this book, I have carefully explained each modiication, making it accessible even to those who are not fully comfortable with M yet. However, if you are completely new to Power Query, I recommend starting with an introductory book before diving into this one. This book is organized into 12 chapters, and I recommend reading them in order. However, if you struggle with Chapters 2 and 3, particularly when working with custom functions, I suggest jumping to Chapter 12, reading its introduction, and then returning to continue. This will help make the logic clearer. When reading each chapter, I highly recommend taking a moment to think through each challenge before looking at the solution. Try to solve it yourself irst, then compare your approach with the provided solutions. This will sharpen your problem-solving mindset and prepare you for real-world challenges you might encounter in your work.