دانلود کتاب SQL را در یک ماه ناهار یاد بگیرید

My experience with the SQL language started in the late 20th century when I first worked with relational databases. I wasn’t a software developer, and my programming skills were limited mostly to typing a few DOS commands on a home computer. Yet even though I was thrust into learning how to use SQL to perform my job, I quickly found how easy it was to write and execute scripts in this intuitive programming language. In the years since, I’ve shared my knowledge of SQL with hundreds of colleagues. What I’ve found interesting is that most of these colleagues weren’t software developers either; they were folks in other departments, such as finance, marketing, or sales, who needed to use SQL to directly access data that was vital to the organization. They didn’t have time to learn concepts like third normal form and tuples. They just needed to learn a few basic commands to get started. If you think about it, we learn a lot of things in life this way. Most of us didn’t learn how to build a car before we learned how to drive. We didn’t go to culinary school before we started cooking meals. We didn’t learn how hard drives stored data and how processors managed CPU threads before we started using computers. Rather, we learned a few necessary concepts and methods to get going and continued learning more as we progressed. This is the main reason why I was excited to write this book. As someone who has read several books in the Month of Lunches series, I appreciate the fact that one of the main goals is to help the reader become “immediately effective” with the subject. Like others in the series, this book was designed and written to help you start using SQL as quickly as possible. I hope that before you reach the end of chapter 2, you’ll already be excited about writing queries in SQL, learning more about the language, and using it with almost any brand of relational database. Although no single book can cover every concept in the SQL language, I believe that by the end of this book, you’ll be able to query and manipulate data successfully for nearly any task required of you. That said, finishing this book should by no means be the end of your journey. I encourage you not only to seek out other books, blog posts, and videos to expand your knowledge of SQL, but also to attend regional events and local user groups to learn from others who use this popular language. For now, though, enjoy the book. Take heart in the fact that a world full of data will soon be available to you!