Store mysql connection credentials in a simple, secure configuration file. Many destinations can then be used with the db_key you specify. You can also run script files against the names you select. The mysql prompt is set for safety.

Install:

gem install mysqlconn

Create ~/.db_connection_alias.yml

config:
  default_arg:          # default arguments
    mysql: -A -C
    mysqldump: --quick --single-transaction -C
db_key:
  host: hostname
  port: port			# Optional
  user: username		# Optional
  password: password		# Optional
#  password: ''		# Optional, prompt for password
  database: database		# Optional
db_key2:
  ...

Protect configuration file:

chmod 600 ~/.db_connection_alias.yml

Connect:

mysqlconn db_key [any additional mysql options]

Look at that beautiful prompt:

mysqluser@db_key [database]> select now();
+---------------------+
| now()               |
+---------------------+
| 2014-04-15 11:09:33 |
+---------------------+
1 row in set (0.02 sec)

mysqluser@db_key [database]>

Pipe:

mysqlconn db_key < script.sql > output

etc..

To mysqldump:

mysqldumpconn db_key [any additional mysqldump options]

Verbose:

Add -v BEFORE the db_key to print out the final executed command to STDERR. BEWARE: It will print plain password.

Add to bash.completion.d or wherever:

_mysqlconn() {
  local cur=${COMP_WORDS[COMP_CWORD]}
  COMPREPLY=( $( compgen -W "$(mysqlconn -l)" -- $cur ) )
}
complete -F _mysqlconn mysqlconn
complete -F _mysqlconn mysqldumpconn

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