Как использовать Query в codeigniter

public function getdata(){	

	$this->db->select('*');
	$this->db->from('table1'); // this is first table name
	$this->db->join('table2', 'table2.id = table1.id'); // this is second table name with both table ids
	$query = $this->db->get();
	return $query->result();

	}
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