combining mysql AND OR queries in Codeigniter

Question

I want to combine AND OR mysql queries in CI. I have already seen this thread: http://codeigniter.com/forums/viewthread/92818/. But they don't provide the exact solution there.

How do I create the following query using strictly the CI framework? (I can create the query easily without the brackets but then it is not the same query.)

SELECT * FROM `Persons` WHERE
LastName='Svendson' AND Age="12" AND
(FirstName='Tove' OR FirstName='Ola' OR Gender="M" OR Country="India") 

P.S.: This is just a sample query even if it makes no sense & Do not suggest writing the entire OR part of the query inside a single where().

EDIT: Basically I want the implementation of the following simple query:

SELECT * FROM `table` WHERE field1='value1' AND (field2='value2' OR field3='value3') 

Answer 1

and this will work?

$this->db->where('LastName', 'Svendson');
$this->db->where('Age', 12);
$this->db->where("(FirstName='Tove' OR FirstName='Ola' OR Gender='M' OR Country='India')", NULL, FALSE);
$query = $this->db->get('Persons');
return $query->result();