This is a non-mathematical introduction to Atomicity and Snapshot Isolation on Column-Oriented Databases explaining the fundamental concepts of this emerging technology. Each unit in this script addresses de-facto standards and design approaches towards transaction. With its highly details pedagogy entailing examples, figures,and algorithms, this book will serve as an ideal resource for students to master and fine-tune the art of writing efficient techniques. Dharavath Ramesh is Assistant Professor at the Indian School of Mines, Dhanbad, India.Currently perusing research in the area of Distributed Databases.