mysql创建用户
学习了:https://blog.csdn.net/leili0806/article/details/8573636
create user ‘root‘@‘127.0.0.1‘ identified by ‘root‘;
grant all privileges on *.* to root@127.0.0.1;
flush privileges;
原文：https://www.cnblogs.com/stono/p/9144087.html
