Scheduling export of tables or database

Create a bat file like startBkp.bat

• Contents of startBkp.bat:

@echo off
echo Generated command to run:
echo.
exp parfile=c:\myparfile.par userid=%*
echo.

• Contents of myparfile.par:
  file c:\myparfile.par
  file=c:\mydumpfile.dmp
  log=C:\mydumpfile.log
  direct=y
  statistics=none
  compress=n
  consistent=n
  

Run it using:
startBkp.bat scott/tiger@database_name
or
startBkp.bat scott/tiger@database_name tables=t1,t2,t3

The same may be scheduled by windows scheduler:
start menu->Programs->Accessories->System tools