select host,user,plugin,authentication_string from mysql.user;
ALTER USER 'root'@'localhost' IDENTIFIED BY '旧密码' PASSWORD EXPIRE NEVER;
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密码';
flush privileges;
select host,user,plugin,authentication_string from mysql.user;
ALTER USER 'root'@'localhost' IDENTIFIED BY '旧密码' PASSWORD EXPIRE NEVER;
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密码';
flush privileges;