root先利用原密码登陆
mysql -u root -p
Enter password: *******
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2.原修改方式syntx error
mysql> set password for root@localhost = password('xxxxx');
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'password('xxxxxx')' at line 1
3.MySQL 8对应修改方式，修改的是当前登陆用户的password
mysql> set password = 'yyyyyy';
Query OK, 0 rows affected (0.07 sec)
mysql>