PostgreSQL Essential Reference is a reference book for developers and system administrators who are already familiar with SQL database concepts but that need clear and concise documentation that is specific to PostgreSQL. The book is divided into 3 parts; Basic SQL Reference, PostgreSQL specifics, and PostgreSQL administration. On a whole, it provides a command, the syntax, available options, description, and example code. Readers will be able to easily utilize the code and concepts into their use f the product. An added advantage to this book is that provides all reference material in two ways; alphabetically and by task. This is important because readers of the book will be looking for this information by both methods.