DBA_AUDIT_SESSION

All audit trail records concerning CONNECT and DISCONNECT

Columns
   ___________________________
 
   ACTION_NAME
      --
   LOGOFF_TIME
      --
   LOGOFF_LREAD
      --
   LOGOFF_PREAD
      --
   LOGOFF_LWRITE
      --
   LOGOFF_DLOCK
      --
   SESSIONID
      --
   RETURNCODE
      --
   CLIENT_ID
      --
   SESSION_CPU
      --
   OS_USERNAME
      --
   USERNAME
      --
   USERHOST
      --
   TERMINAL
      --
   TIMESTAMP
      --

Related:

Simon Sheppard
SS64.com