set date_time=%date%_%time%
SET date_time=%date_time:/=%
SET date_time=%date_time: =%
SET date_time=%date_time:Thu=%
SET date_time=%date_time:Fri=%
SET date_time=%date_time:Sat=%
SET date_time=%date_time:Sun=%
SET date_time=%date_time:Mon=%
SET date_time=%date_time:Tue=%
SET date_time=%date_time:Wed=%
SET date_time=%date_time::=%
SET date_time=%date_time:.=%

echo %date_time%

exp system/manager@wind file=D:\wt\pdmlink_export\wc_exp_%date_time%_dump.dmp owner=wcuser log=D:\wt\pdmlink_export\wc_exp_%date_time%_dump.log