MySQL创建新用户时登录出错（ERROR 1045）

在MySQL中我用如下语句创建了一个新的用户

<span style="font-size:18px;">CREATE USER 'KevinYin'@'%' IDENTIFIED BY 'password'
GRANT ALL PRIVILEGES ON *.* TO 'KevinYin'@‘%'</span>

<span style="font-size:18px;">FLUSH PRIVILEGES;</span>

紧接着我用新创建的用户进行登录：
<span style="font-size:18px;">mysql -u KevinYin -p</span>mySQL报错，信息如下：
<span style="font-size:18px;">ERROR 1045 (28000):　Access denied for user 'KevinYin'@'localhost' (using password: YES)</span>但是，我如果这样登录：
<span style="font-size:18px;">mysql -u KevinYin </span>即可正常登录
不清楚是什么造成这样的故障的，在网上找了一阵发现了原因：

“When multiple matches are possible, the server must determine which of them to use. It resolves this issue as follows: (...)

When a client attempts to connect, the server looks through the rows [of table mysql.user] in sorted order.
The server uses the first row that matches the client host name and user name.
(...) The server uses sorting rules that order rows with the most-specific Host values first. Literal host names [such as 'localhost'] and IP addresses are the most specific.”这是由系统中的匿名用户及MySQL的认证机制造成的。解决办法就是删除系统中的匿名用户：
DROP USER ''@'localhost'即可解决。
详情参考：MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost'
(using password: YES)