https://blog.csdn.net/qq_16775293/article/details/84315539
源cat /etc/apt/sources.list
deb http://mirrors.ustc.edu.cn/debian stretch main contrib non-free
deb http://mirrors.ustc. >查看详情
打开putty,双击桌面putty,然后双击bananapi,然后输入密码
如果命令输入错误,或按回车没有反应,那么直接ctrl+c中止该命令
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu >查看详情
标红色为固定写法,熟记即可
登录mysql
mysql -uMysql服务器ip地址 -u用户名 -p密码
root@localhost ~ # mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; >查看详情
转:http://www.runoob.com/mysql/mysql-group-by-statement.html
mysql> set names utf8;
mysql> SELECT * FROM employee_tbl;
+----+--------+---------------------+--------+
| id | na >查看详情
转:http://www.runoob.com/http/http-intro.html
HTTP 简介
HTTP协议是Hyper Text Transfer Protocol(超文本传输协议)的缩写,是用于从万维网(WWW:World Wide Web )服务器传输超文本到本地浏览器的传送协议。。
HTTP是一个基于TCP/IP通信协议来传递数据(H >查看详情
转:https://www.oschina.net/question/89964_65912
即使你认为自己已对 MySQL 的 LEFT JOIN 理解深刻,但我敢打赌,这篇文章肯定能让你学会点东西!
ON 子句与 WHERE 子句的不同
一种更好地理解带有 WHERE ... IS NULL 子句的复杂匹配条件的简单方法
>查看详情