mysql备份数据库并以日期命名

@echo off
if %time:~0,2% leq 9 (set hour=0%time:~1,1%) else (set hour=%time:~0,2%) 
mysqldump -h localhost -u root -p --databases db1 db2 db3... > D:\数据库备份\%date:~0,10%_%hour%_%time:~3,2%_%time:~6,2%.sql
echo "恭喜您，备份成功！"
pause