1.创建用户
create user 'username'@'localhost' identified by 'pwd'
2.修改访问权限
在mysql数据下修改user表用户host为'%'
update user set host='%' where user='username'
3.修改密码
MYSQL8.0密码默认加密方式为 default_authentication_plugin=caching_sha2_password 所以会造成不兼容问题
alter user 'username'@'localhost' identified with mysql_native_password by 'newpwd'
4.修改操作权限
MYSQL 8.0不支持创建用户时授权,必须先创建,后授权
grant all privileges on *.* to 'username'@'%' with grant option;