你真的了解如何登录MySQL么？_MySQL

　　昨天同事碰到一个问题，在MySQL上创建了一个用户，host设置为%，本地竟然无法登录。创建一个host为localhost的同名用户后，本地可以登录。感脚很怪异，下面我们重新分析产生这个问题的原因。

1. 现场重现

*root本地登录

Shell>./mysql -urootWelcome to the MySQL monitor.  Commands end with ; or /g.Your MySQL connection id is 7Server version: 5.5.17-debug-log Source distributionCopyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '/h' for help. Type '/c' to clear the current input statement.