دانلود کتاب عملی SQL – راهنمای مبتدیان برای داستان سرایی با داده ها

Since the publication of the first edition of Practical SQL, I’ve received kind notes about the book from readers around the world. One happy reader said it helped him ace SQL questions on a job interview. Another, a teacher, wrote to say that his students remarked favorably about having the book assigned for class. Others just wanted to say thanks because they found the book helpful and a good read, two pieces of feedback that will warm the heart of most any author. I also sometimes heard from readers who hit a roadblock while working through an exercise or who had trouble with software or data files. I paid close attention to those emails, especially when the same question seemed to crop up more than once. Meanwhile, during my own journey of learning SQL—I use it every day at work—I’d often discover a technique and wish that I’d included it in the book. With all that in mind, I approached the team at No Starch Press with the idea of updating and expanding Practical SQL into a second edition. I’m thankful they said yes. This new version of the book is more complete, offers stronger guidance for readers related to software and code, and clarifies information that wasn’t as clear or presented as accurately as it could have been. The book has been thoroughly enjoyable to revisit, and I’ve learned much along the way. This second edition includes numerous updates, expansions, and clarifications in every chapter. Throughout, I’ve been careful to note when code syntax adheres to the SQL standard—meaning you can generally use it across database systems—or when the syntax is specific to the database used in the book, PostgreSQL.