How can be better to select from db all users that have name begining from "A" ?

[eluser]New One[/eluser]
for example i have db 'users' and field 'name'
How can be better to select from db all users that have name begining from "A" ?

$this->db->where('name',"like '%A'");
$data['query'] = $this->db->get('users');

but i think that something is wrong here :$this->db->where('name',"like '%A'");
please help