To see DB processes running on your Oracle DB, the code below can be used. Specially handy if you want to check which part of your package or stored procedure is taking time to execute. Indispensable for performance tuning.
SELECT sess.sid, sess.serial#, sess.sql_child_number, sess.sql_exec_id,
sess.process, sess.status, sess.username, sess.osuser, sess.program,
FROM v$session sess,
WHERE sql.sql_id(+) = sess.sql_id
AND sess.type = 'USER'
--AND sess.osuser = 'yourwindowslogin';
Equivalent in SQL Server/Sybase
The equivalent command in Sybase or SQL Server is SP_WHO. However, the Oracle version provides more information.
For now, just this. I'll provide additional details later. For additional fields, try to check the schema of v$session.