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my.cnf配置文件参数设置：
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[root@cacti ~]# head -7 /etc/my.cnf
[MySQL]
prompt="(\\u@\\h:\R:\m:\\s)[\\d]> "
pager="less -i -n -S"
tee="/tmp/query.log"
no-auto-rehash
[mysqld]配置文件参数介绍：
这样就能很方便的知道当前位于哪个mysql db上，正在以哪个用户登录，对哪个数据库进行操作，防止误操作；并且还能显示当前时间。
tee="/tmp/query.log" 是把每次查询的SQL及其结果都记录到 /tmp/query.log 里，便于追踪。
pager="less -i -n -S" 则是把每次输出都用less来控制显示，便于输出结果格式更加容易阅读，尤其是行记录长度超过一屏宽度时。
重启MySQL服务：
[root@cacti ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL... SUCCESS!
登录mysql后将有以下提示：
[root@cacti ~]# mysql -uroot -p'xiaowytest' -S /tmp/mysql3307.sock
**Logging to file '/tmp/query.log'**
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.20-log MySQL Community Server (GPL)
Copyright (c) 2000, 2014, 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.
(root@localhost:17:53:43)[(none)]>(root@localhost:17:53:43)[(none)]> use ranzhidb;
Database changed
(root@localhost:17:56:15)[ranzhidb]> select id,account from droa_attend where id=10 and account='xiawu';
Empty set (0.00 sec)
(root@localhost:17:57:08)[ranzhidb]> select id,account from droa_attend where id=10 and account='xiaowu';
+----+---------+
| id | account |
+----+---------+
| 10 | xiaowu |
+----+---------+
1 row in set (0.00 sec)[root@cacti ~]# tailf /tmp/query.log
Server version: 5.6.20-log MySQL Community Server (GPL)
Copyright (c) 2000, 2014, 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.
(root@localhost:17:53:43)[(none)]> use ranzhidb;
Database changed
(root@localhost:17:56:15)[ranzhidb]> select id,account from droa_attend where id=10 and account='xiawu';
Empty set (0.00 sec)
(root@localhost:17:57:08)[ranzhidb]> select id,account from droa_attend where id=10 and account='xiaowu';
+----+---------+
| id | account |
+----+---------+
| 10 | xiaowu |
+----+---------+
1 row in set (0.00 sec)参考博文地址：http://www.imysql.cn/2008_07_09_show_mysql_client_settings
