This book is not Oracle theory or database management system theory book. It is not Oracle programming book either. It is an Oracle DBA (Database Administrator) practice process and scripts and documentations based on author's working experiences. The readers can be people who are interested in learning knowledge on Oracle database administrations like developers working on Oracle database, Oracle DBA beginners who wants to know how to manage their Oracle database, IT managers who wants to have some concepts and knowledge on Oracle DBA jobs etc. In this book, the author provides process, scripts, tools and methods to do Oracle DBA jobs like backup/recover methods and scripts, database clone scripts, regular database maintenance like index defragmentation scripts etc in Oracle 11g and 12C and Windows Server environments.