@echo off
set /a Hyear=%date:~0,4%
set /a Hmonth1=%date:~5,1%
set /a Hmonth2=%date:~6,1%
set /a Hmonth=%Hmonth1%*10+%Hmonth2%
set /a Hdate1=%date:~8,1%
set /a Hdate2=%date:~9,1%
set /a Hdate=%Hdate1%*10+%Hdate2%
exp userid=sdfdafs/sdfdafs file=scf%Hdate%.dmp
這樣的話只保存一個月的數據