Active Class DB problem

[eluser]Ngulo[/eluser]
hi all ,i'm trying to order_by() my data from db

i would like to order them by 2 parametres and i can't do it without your suggestions

i need something like this:

Code:

$this->db->order_by('data ASC , hour DESC')->get('table');

now i'm trying very stupid method ,and they aren't still working , how can i write this code to make it works?

thanks a lot anticipated