Ignoring query to other database解决方法，原理是登录mysql命令中没有使用-u参数，导致产生了这个mysql错误。附上解决方案，大家共勉。
Mysql错误: Ignoring query to other database解决方法
今天登陆mysql show databases出现Ignoring query to other database错误，又试了几个命令和sql全部提示Ignoring query to other database错误
错误如下：
[root@4chinastor www]# mysql -root -p（注意啊，这里一定要用-u）
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 61
Server version: 5.6.35-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> show databases;
Ignoring query to other database
mysql> use mysql;
Database changed
mysql> show tables;
Ignoring query to other database
mysql> show databases;
Ignoring query to other database
mysql>
这是神马情况，确定密码是没有错的啊，后来登入登出几次，折腾了半天才发现原来是在连接mysql时没有"-u"参数导致的
重新连接mysql 加上-u参数 一切正常
[root@4chinastor www]# mysql -root -p 输入mysql密码，
[root@4itcaigou www]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 62
Server version: 5.6.35-log Source distribution
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| qdmxxstor_db |
| wwwdb |
+--------------------+
5 rows in set (0.00 sec)
搞技术，一定要严谨啊，切记切记！
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