@echo off
set FILEPREFIX=*****
set BKFILEPATH=*******
set BKFILEDATE=%Date:~0,4%%Date:~5,2%%Date:~8,2%
set HHMMSS=%time:~0,2%%time:~3,2%%time:~6,2%
exp 'username/pwd@sid as sysdba' owner=***** file=%BKFILEPATH%\%FILEPREFIX%_%BKFILEDATE%.dmp log=%BKFILEPATH%\%BKFILEDATE%.log buffer=462000