Oracle Database is a relational database with object and Extensible Markup Language(XML) capabilities. In a relational database, all data is stored in two-dimensional tablesthat are composed of rows and columns. Oracle Database enables you to store data, update it, and efficiently retrieve it, with a high degree of performance, reliability, and scalability.
What you will learn
The database contains user data,metadata, and control structures.Metadata, ordata about the data, is the collection of information on disk that permits Oracle software to manage user data. An example of metadata is the data dictionary. Control structures (such as the control file and online redo log files) ensure the integrity, availability, and recoverability of user data.