my.cnf配置文件參數設置：
[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]
配置文件參數介紹：
這樣就能很方便的知道當前位於哪個mysql db上，正在以哪個用戶登錄，對哪個數據庫進行操作，防止誤操作；並且還能顯示當前時間。
tee="/tmp/query.log" 是把每次查詢的SQL及其結果都記錄到 /tmp/query.log 裏，便於追蹤。
pager="less -i -n -S" 則是把每次輸出都用less來控制顯示，便於輸出結果格式更加容易閱讀，尤其是行記錄長度超過一屏寬度時。
重啓MySQL服務：
[root@cacti ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL... SUCCESS!
登錄mysql後將有以下提示：
[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)