Database Software

HI

Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production

I am new in external table so i have tried following cmd.

create directory dir_1 as 'E:\ora_dirt' ;

grant read, write on directory dir_1 to HR;

select * from all_directories;

create table emp_ext
(emp_id number,
emp_name varchar2(30)
)
organization external
(
type oracle_loader
default directory DIR_1
access parameters
(
fields terminated by ','
( id , name)
)
location ('emp.dat')
)
reject limit unlimited;

select * from emp_ext

since I am not able to see DIR_1 in E:\ drive due to which i havnt created 'emp.dat' file and on executing select on external table i m geting expected error
*"ORA-29913: error in executing ODCIEXTTABLEOPEN callout ORA-29400: data cartridge error KUP-04043: table column not found in external source: EMP_ID"*

please tell me how to create that file in directory "DIR_1" .

thanks