Full Database Backup:Export Utility

set ORACLE_SID= test
set ORACLE_HOME=D:\oracle\product\10.2.0\db_1
exp system/welcome@test file=\exp_full_test_%date:~7,2%-%date:~4,2%-% date:~10,4%.dmp log\exp_full_test_%date:~7,2%-%date:~4,2%-%date:~10,4%.log full=y