Résumé de l'ouvrage This book is not a training book like the others; this is not a self-study book, nor a reference manual, nor a practical manual... This book presents the database development environment to namely ORACLE, which aims to initiate and master the Oracle environment by presenting its architecture. Notes that I have used over the last decade to the Higher In-stitute of Management of Gabes (Tunisia) within the IT depart-ment applied this course to management. This book suitable for computer lessons for degree students and for students in Computer Engineering. The main chapters covered in this book are: - The Oracle architecture basics - The logical structure of ORACLE database - Transaction management - The Administrative Tools - Backup and Recovery Biographie de l'auteur Assistant Professor in Computer sciences at Higher Institute of Management - Gabes Head of Computer Science applied to management Department Résumé : This book is not a training book like the others; this is not a self-study book, nor a reference manual, nor a practical manual... This book presents the database development environment to namely ORACLE, which aims to initiate and master the Oracle environment by presenting its architecture. Notes that I have used over the last decade to the Higher In-stitute of Management of Gabes (Tunisia) within the IT depart-ment applied this course to management. This book suitable for computer lessons for degree students and for students in Computer Engineering. The main chapters covered in this book are: - The Oracle architecture basics - The logical structure of ORACLE database - Transaction management - The Administrative Tools - Backup and Recovery Auteur(s) : Assistant Professor in Computer sciences at Higher Institute of Management - Gabes Head of Computer Science applied to management Department Assistant Professor in Computer sciences at Higher Institute of Management - Gabes Head of Computer Science applied to management Department