㈠ 在 Bash 层修改 MYSQL_PS1 变量

[root@localhost ~]# export MYSQL_PS1="(\u@\h) [\d]> "
[root@localhost ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 73
Server version: 5.5.28 MySQL Community Server (GPL)

Copyright (c) 2000, 2012, 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)]> use test;
Database changed
(root@localhost) [test]> 

     ㈡ MySQL 命令行参数

[root@localhost ~]# mysql -u root -p --prompt="(\u@\h) [\d]> "
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 74
Server version: 5.5.28 MySQL Community Server (GPL)

Copyright (c) 2000, 2012, 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)]> 

     ㈢ 配置文件 /etc/my.cnf

[mysql]
prompt=(\\u@\\h) [\\d]>\\_
 
又或者：
[mysql]
prompt="\\r:\\m:\\s> "

要多加一个反斜线\.

     ㈣ 在 MySQL 中使用 prompt 命令

mysql> prompt \r:\m:\s\P>\_
PROMPT set to \'\r:\m:\s\P>\_\'
08:20:42pm> prompt
Returning to default PROMPT of mysql> 
mysql> 

     附录：

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 5.0.25)
\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
\x	
x, for any “x” not listed above