学习php初始，了解到数据库MySQL，笔者在安装过程中发现，mysql 修改root密码时总是提示1064语法错误，

1064语法错误提示如下

首先使用

mysql>  set  password  for  root@localhost  =  password('123');

语句修改root密码，出现错误提示如下

mysql> set password for root@localhost = password('123456');
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('123456')' at line 1

把password改为authentication_string后，发现还是提示错误

mysql> update user set authentication_string=password("123456") where user="root";
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 '("123456") where user="root"' at line 1
mysql>

不解，遂采用

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';

OK，完成

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';
Query OK, 0 rows affected (0.13 sec)

经测试使用

SET PASSWORD = '123';

也是OK的

mysql> SET PASSWORD = '123';
Query OK, 0 rows affected (0.14 sec)