mysql 匿名ユーザの削除の履歴

次の通りuserが匿名であるものを削除する

mysql> select user,host,password from mysql.user;
 +------+-----------+------------------+
 | user | host | password |
 +------+-----------+------------------+
 | root | localhost | |
 | root | exhost | |
 | root | 127.0.0.1 | |
 | | localhost | |
 | | exhost | |
 +------+-----------+------------------+


削除方法
DELETE FROM mysql.user WHERE User = '';