SQL> select * from dba_external_locations;
SYS EXT_TAB_DBAC_TNSNAMES
tnsnames.ora
SYS EXT_DIR_DBAC_CLIENT
SYS EXT_TAB_DBAC_SQLNET
sqlnet.ora
SYS EXT_DIR_DBAC_CLIENT
SYS EXT_TAB_DBAC_LISTENER
listener.ora
SYS EXT_DIR_DBAC_SERVER
SYS EXT_TAB_DBAC_ALERT
alert_PRD.log
SYS EXT_DIR_DBAC_ALERT
AND
SQL> select * from dba_external_tables;
SYS EXT_TAB_DBAC_TNSNAMES SYS
ORACLE_LOADER SYS EXT_DIR_DBAC_CLIENT
0 CLOB
RECORDS DELIMITED BY NEWLINE
NOLOGFILE
ALL
SYS EXT_TAB_DBAC_SQLNET SYS
ORACLE_LOADER SYS EXT_DIR_DBAC_CLIENT
0 CLOB
RECORDS DELIMITED BY NEWLINE
NOLOGFILE
ALL
SYS EXT_TAB_DBAC_LISTENER SYS
ORACLE_LOADER SYS EXT_DIR_DBAC_SERVER
0 CLOB
RECORDS DELIMITED BY NEWLINE
NOLOGFILE
ALL
SYS EXT_TAB_DBAC_ALERT SYS
ORACLE_LOADER SYS EXT_DIR_DBAC_ALERT
0 CLOB
RECORDS DELIMITED BY NEWLINE
NOLOGFILE
ALL