@ECHO OFF
for /f "tokens=1-4 delims=/ " %%a in ('date/t') do (
set dw=%%a
set mm=%%b
set dd=%%c
set yy=%%d
)

SET bkupdir=C:\path\to\where\you\want\backups
SET mysqldir=D:\path\to\mysql
SET dbname=this_is_the_name_of_my_database
SET dbuser=this_is_my_user_name

@ECHO Beginning backup of %dbname%...

%mysqldir%\bin\mysqldump -B %dbname% -u %dbuser% > %bkupdir%\dbBkup_%dbname%_%yy%%mm%%dd%.sql
@ECHO Done! New File: dbBkup_%dbname%_%yy%%mm%%dd%.sql
pause