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prompt命令可以在mysql提示符中显示当前用户、数据库、时间等信息
mysql -uroot -p --prompt="//u@//h://d //r://m://s>"
设置成功后：
Welcome to the MySQL monitor. Commands end with ; or /g.
Your MySQL connection id is 5
Server version: 5.1.60-log Source distribution
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) 11:04:23>
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
选项说明:
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
