[eluser]Randy Casburn[/eluser]
Hi eiso,
Welcome to CI!
1) Make sure your second database group is declared with a non-persistent connection type
2) $secondDB = $this->load->database('groupname',TRUE);
3) $secondDB->query('DELETE * FROM USERS');
// JUST kidding with that last statement ;-)
You only need to worry about the naming convention with the second DB. It will keep you out of trouble down the road if you do both. For a retro-fit this will work fine.
Hope this helps,
Randy