where group codeigniter

1$this->db->group_by(array("title", "date"));  
2// Produces: GROUP BY title, date

1$this->db->select('ae_users.employee_id, ae_users.emp_name, ae_users.emp_name2, ae_users.emp_name3');
2		$this->db->from('ae_users');                
3		$this->db->where_in('ae_users.employee_id',$employee_ids);
4     
5		$query =$this->db->get();
6             
7		if ($query->num_rows()) {
8			return $query->result_array();
9		} else {
10			return 0;
11		}

1$data = array(
2        'title' => 'My title',
3        'name' => 'My Name',
4        'date' => 'My date'
5);
6
7$this->db->insert('mytable', $data);
8// Produces: INSERT INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date')

1$this->db->select('*')->from('my_table')
2        ->group_start()
3                ->where('a', 'a')
4                ->or_group_start()
5                        ->where('b', 'b')
6                        ->where('c', 'c')
7                ->group_end()
8        ->group_end()
9        ->where('d', 'd')
10->get();
11
12// Generates:
13// SELECT * FROM (`my_table`) WHERE ( `a` = 'a' OR ( `b` = 'b' AND `c` = 'c' ) ) AND `d` = 'd'
14