The Oracle Database uses to manipulate data about users,place ,employees and other data. The Oracle Database is the most used Database in the world. It is simple and easy to use. SQL Developer is used to handle these users' data in a Graphical user environment. If you learn Oracle Database , you will get lots of opportunities from IT segment.
|Oracle Database 11g|
Installation is also same as Windows 7 because both OS are almost same.But you will get some error in the beginning. Just retry installation.