How to get my Oracle session informations

In Oracle/PLSQL, the userenv function can be used to retrieve information about the current Oracle session.

The syntax for the userenv function is:

userenv( parameter )

parameter is the value to return from the current Oracle session.

For Example:

userenv('ENTRYID')	would return FALSE
userenv('LANGUAGE')	would return 'AMERICAN_AMERICA.WE8DEC'

 The possible values for parameter are:

Parameter	Explanation
CLIENT_INFO	Returns user session information stored using the DBMS_APPLICATION_INFO package
ENTRYID	Available auditing entry identifier
INSTANCE	The identifier number of the current instance
ISDBA	Returns TRUE if the user has DBA privileges. Otherwise, it will return FALSE.
LANG	The ISO abbreviation for the language
LANGUAGE	The language, territory, and character of the session. In the following format:      language_territory.characterset
SESSIONID	The identifier of the auditing session
TERMINAL	The OS identifier of the current session