异步Mysql

建议先阅读官方文档异步MySQL客户端章节

注意:必须等待返回结果后才能执行下一条SQL

附录：mysql快速安装

下载源

wget -i http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm

安装rpm源

rpm -ivh mysql57-community-release-el7-7.noarch.rpm

安装服务器

yum -y install mysql-community-server

启动数据库

systemctl  start  mysqld.service

获取随机密码

grep "password" /var/log/mysqld.log

登录mysql

修改密码

alter user 'root'@'localhost' identified by 'Root!!2019';

刷新权限

flush privileges