Simple Topic just to people who asked before why NLS_CHARACTER SET Not appearing in my V$PARAMETER View :
Just Use two Below Query Depend on your version
SQL> select value from nls_database_parameters whereparameter = 'NLS_CHARACTERSET' ;
VALUE
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AR8MSWIN1256
Check the National Character set :
SQL> select value from nls_database_parameters whereparameter = 'NLS_NCHAR_CHARACTERSET' ;
Or you can Use :
SELECT value$ FROM sys.props$ WHERE name = ‘NLS_CHARACTERSET’ ;
Thank you
Osama Mustafa