Create 两条比较实用的mysql导入导出命令

http://www.lampblog.net/2011/07/%E4%B8%A4%E6%9D%A1%E6%AF%94%E8%BE%83%E5%AE%9E%E7%94%A8%E7%9A%84mysql%E5%AF%BC%E5%85%A5%E5%AF%BC%E5%87%BA%E5%91%BD%E4%BB%A4/