controller db

[eluser]Captain_Fluffy_Pants[/eluser]
how do i include a the database from path "application/config" in a controller?
is it
this:

Code:

$this->db->config('database');

this:

Code:

$this->include('database');

this:

Code:

$this->load->config('database');

this:

Code:

$this->load->database('group_name');

or this:

Code:

$this->config('database');