sqlplus how to find details of the currently connected database session

Question

I have very recently started to work on oracle databases. Generally I have many sqlplus windows open to different oracle databases. When switching from one sqlplus session to another, how can i view the current session details for each sqlplus session ? Any help is greatly appreciated!

Answer 1

show user

to get connected user

 select instance_name from v$instance

to get instance or set in sqlplus

set sqlprompt "_USER'@'_CONNECT_IDENTIFIER> "

Answer 2

I know this is an old question but I did try all the above answers but didnt work in my case. What ultimately helped me out is

SHOW PARAMETER instance_name