DBA_AUDIT_EXISTS

SQL> DESC DBA_AUDIT_EXISTS

 Name                                     Null?                Type

 ----------------------------------------------------------------------------
 OS_USERNAME                                           VARCHAR2(255)
 USERNAME                                                    VARCHAR2(30)
 USERHOST                                                    VARCHAR2(128)
 TERMINAL                                                 VARCHAR2(255)
 TIMESTAMP                                                DATE
 OWNER                                                              VARCHAR2(30)
 OBJ_NAME                                                          VARCHAR2(128)
 ACTION_NAME                                            VARCHAR2(28)
 NEW_OWNER                                              VARCHAR2(30)
 NEW_NAME                                                VARCHAR2(128)
 OBJ_PRIVILEGE                                          VARCHAR2(16)
 SYS_PRIVILEGE                                          VARCHAR2(40)
 GRANTEE                                                          VARCHAR2(30)
 SESSIONID                           NOT NULL              NUMBER
 ENTRYID                              NOT NULL              NUMBER
 STATEMENTID                    NOT NULL             NUMBER
 RETURNCODE                     NOT NULL             NUMBER
 CLIENT_ID                                                             VARCHAR2(64)
 ECONTEXT_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)
 TRANSACTIONID                                                RAW(8)
 SCN                                                                        NUMBER
 SQL_BIND                                                         NVARCHAR2(2000)
 SQL_TEXT                                                         NVARCHAR2(2000)
 OBJ_EDITION_NAME                                        VARCHAR2(30)