SQL* Plus:

It is the interactive user interface to the ORACLE database management system. It is used to issue ad-hoc queries and to view the query result on the screen. Some of the features of SQL* plus are:

• A built-in command line editor can be used to edit SQL queries.
• There are numerous commands to format the output of a query.
• Provides an online-help.
• Query results can be stored in files which then can be printed.