TYPES OF EDITIONS :1) Enterprise Edition : ? It contains all features and is the rich extensible version of the Oracle databse.? It includes features such as Flash Back Database.? The licensed functionalities that are supported are :? Oracle Spatial? Oracle OLAP? Oracle Label Security? Oracle Data Mining2) Standard Edition :? It provides some subset features of Enterprise Edition.? It includes features that are needed by a small business entity.3) Personal Edition : ? It allows for the development of applications which run on either the standard or Enterprise Edition.? The Edition is not suitable for Production Environment.DATABASE MANAGEMENT SYSTEMS :? DBMS is a program which takes care of ? Storing of Information.? Retrieving of Information.? Modification of Information.? Deletion of Information.? Type of Databases ** Hierarchical ** Network ** Relational ** Object Relational ** Object Oriented RELATIONAL MODELS :? The Model was first outlined by Dr. E. F. Codd in 1970.? The components of Relational Model are : ? Collection of objects or relations that store the data.?? A set of operations that can act on the relations to produce other relations.? Data integrity for accuracy and consistency? A Relational database uses relations or two dimensional tables to store information.