【1】安装Centos 6.4提示找不到安装文件 The centos disc was not found in any of your drives.Please insert the centos disc and press OK to retry 解决方法: 把CD/DVD的IDE 连接打开 或者在设置中勾选 已连接
与Ubuntu不同,使用apt-get install packages时Debian可能会提示: Media change: please insert the disc labeled'Debian GNU/Linux 8.6.0 _Jessie_ - Official amd64 DVD Binary-1 20160917-14:25' in the drive '/media/cdrom
为什么80%的码农都做不了架构师?>>> percentile_cont(fraction) WITHIN GROUP (ORDER BY sort_expression) percentile_disc(fraction) WITHIN GROUP (ORDER BY sort_expression) percentile_disc returns a value in your