删除MySQL匿名用户

今天安装MySQL-5.1.62后，登陆进去查看用户，发现有四个

mysql> select user,host from user;
+------+--------------+
| user | host        |
+------+--------------+
|      | MySQL-Server |
| root | MySQL-Server |
|      | localhost    |
| root | localhost    |
+------+--------------+
4 rows in set (0.00 sec)

其中两个看不到用户名，通过正常的drop user无法删除
drop user ""@localhost
drop user ""@"MySQL-Server"
结果还是可以看得到，并没有被删除。

后来想到个方法，就是直接删除这个表的内容
mysql> delete from user where user='';
Query OK, 2 rows affected (0.01 sec)

mysql> select user,host from user;
+------+--------------+
| user | host        |
+------+--------------+
| root | MySQL-Server |
| root | localhost    |
+------+--------------+
2 rows in set (0.00 sec)

mysql> delete from user where host="MySQL-Server";
Query OK, 1 row affected (0.00 sec)

mysql> select user,host from user;               
+------+-----------+
| user | host      |
+------+-----------+
| root | localhost |
+------+-----------+
1 row in set (0.00 sec)

最后再刷新下就好了。
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

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