One-click backup of MySQL database batch processing

@echo off
echo.
echo MySQL database backup
echo *****************************
echo.
echo Today is %date%
echo time is %time%
echo.
echo *****************************

set "Ymd=%date:~,4%%date:~5,2%%date:~8,2%"
md "D:\%Ymd%"
"C:\Program Files\MySQL\MySQL Server 5.1\bin\mysqldump" --opt -Q -uroot -proot --default-character-set=gbk mysql > "D:\%Ymd%\"
echo.
echo MySQL database backup is completed, please check. . .
echo.
echo.
pause