$this- db- where in codeigniter code example

Example 1: codeigniter db where between

$minvalue = '2020-01-01 00:00:00';
$max_value = '2050-12-31 23:59:59';
$this->db->where("date_field BETWEEN '$minvalue' AND '$maxvalue'");

Example 2: where_in codeigniter

$this->db->select('ae_users.employee_id, ae_users.emp_name, ae_users.emp_name2, ae_users.emp_name3');
		$this->db->from('ae_users');                
		$this->db->where_in('ae_users.employee_id',$employee_ids);
     
		$query =$this->db->get();
             
		if ($query->num_rows()) {
			return $query->result_array();
		} else {
			return 0;
		}