连接MySQL数据库的两种方式介绍
连接MySQL操作是连接进程和MySQL数据库实例进行通信。从开发的角度来说，本质上是进程通信，常用的进程通信方式有管道、命名管道
连接MySQL操作是连接进程和MySQL数据库实例进行通信。从开发的角度来说，本质上是进程通信，常用的进程通信方式有管道、命名管道、命名字、TCP/IP套接字、Unix域名套接字
TCP/IP套接字连接方式是MySQL在任何平台都提供的一种连接方式，也是网络中使用最多的一种方式。这种方式在TCP/IP连接上建立一个基于网络的连接请求，一般情况下客户端在一台服务器上，而MySQL实例在另外一台服务器上，，这两台机器通过TCP/IP网络连接
首先远程连接的客户端连接的用户有权限才可以被连接，我们查看到了wu这个用户允许任何机器远程连接
Unix域套接字连接：
在Linux和Unix环境下，还可以使用Unix域套接字连接。Unix域套接字其实不是网络协议，所以只能使用MySQL客户端和数据库实例在同一台服务器上的情况下使用。可以在配置文件中指定套接字文件路径,如-socket=/tmp/mysql.sock。当数据库启动之后使用如下方法查找套接字
然后就可以通过套接字的方式连接了
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