DBA_AUDIT_SESSION

SQL> DESC DBA_AUDIT_SESSION

 Name                                      Null?                   Type

 ---------------------------------------------------------------------------

 OS_USERNAME                                                VARCHAR2(255)
 USERNAME                                                     VARCHAR2(30)
 USERHOST                                                      VARCHAR2(128)
 TERMINAL                                                     VARCHAR2(255)
 TIMESTAMP                                                     DATE
 ACTION_NAME                                                  VARCHAR2(28)
 LOGOFF_TIME                                                   DATE
 LOGOFF_LREAD                                                  NUMBER
 LOGOFF_PREAD                                                  NUMBER
 LOGOFF_LWRITE                                                 NUMBER
 LOGOFF_DLOCK                                                  VARCHAR2(40)
 SESSIONID                                 NOT NULL                NUMBER
 RETURNCODE                           NOT NULL            NUMBER
 CLIENT_ID                                                               VARCHAR2(64)
 SESSION_CPU                                                              NUMBER
 EXTENDED_TIMESTAMP                                 TIMESTAMP(6) WITH TIME ZONE
 PROXY_SESSIONID                                               NUMBER
 GLOBAL_UID                                                   VARCHAR2(32)
 INSTANCE_NUMBER                                    NUMBER
 OS_PROCESS                                                   VARCHAR2(16)