想必大家在命令行操作mysql的时候会十分发愁现在的操作的是那个数据库吧，至少我就纠结过，可能您会说我打一条命令不就知道了，是的这样做确实可以的。
可是今儿给大家介绍个好用的命令--prompt
[root@fsailing1 ~]# mysql -uroot -p --prompt="\u@\h:\d \r:\m:\s>"
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 378
Server version: 5.0.95 Source distribution
Copyright (c) 2000, 2011, 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:(none) 08:23:32>use test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
root@localhost:test 08:23:44>exit;
这样做的好处就是让我们大家在操作数据库时更加方便快捷。
您也可以在在my.cnf配置文件里进行配置：
[mysql]
prompt=mysql(\u@\h:\d)>
default-character-set=utf8
[root@fsailing1 ~]# vim /etc/my.cnf
[root@fsailing1 ~]# service mysqld restart
停止 MySQL： [确定]
启动 MySQL： [确定]
[root@fsailing1 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.0.95 Source distribution
Copyright (c) 2000, 2011, 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(root@localhost:(none))>use test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql(root@localhost:test)>
这里也给出需要的一些个选项供大家参考。
Option Description c A counter that increments for each statement you issue D The full current date d The default database h The server host l The current delimiter (new in 5.1.12) m Minutes of the current time n A newline character O The current month in three-letter format (Jan, Feb, …) o The current month in numeric format P am/pm p The current TCP/IP port or socket file R The current time, in 24-hour military time (0–23) r The current time, standard 12-hour time (1–12) S Semicolon s Seconds of the current time t A tab character U
Your full user_name@host_name account name
u Your user name v The server version w The current day of the week in three-letter format (Mon, Tue, …) Y The current year, four digits y The current year, two digits _ A space A space (a space follows the backslash) ' Single quote " Double quote \ A literal “” backslash character xx, for any “x” not listed above