agroup 2 OR after和codeigniter

Question

问候！我对这个SQL查询有点问题，我需要加入几个＆＃34; OR＆＃34;在括号上..我不知道该怎么做..所以这就是例子：

SELECT a.a1, b.b1, c.c1 from a inner join b on a.a1=b.b1 inner join c on a.a1 = c.c1 where c.c2='t' and ( a.a1 like %XXXX% or b.b1 like %XXXX% )

这就是我在codeigniter代码上写的

$this->db->select("a.a1, b.b1, c.c1");
$this->db->where("c.c2",'t');
$this->db->like("a.a1", $match);
$this->db->or_like("b.b1", $match);
$this->db->join("b","a.a1 = b.b1",'inner');
$this->db->join("c","a.a1 =c.c1",'inner');

但这是输出，显然不是我想要的

SELECT a.a1, b.b1, c.c1 from a inner join b on a.a1=b.b1 inner join c on : a.a1 = c.c1 where c.c2='t' and a.a1 like %XXXX% or b.b1 like %XXXX%

Answer 1

$this->db->select("a.a1, b.b1, c.c1");
$this->db->where("c.c2",'t');
$this->db->group_start(); // (
$this->db->like("a.a1", $match);
$this->db->or_like("b.b1", $match);
$this->db->group_end(); // )
$this->db->join("b","a.a1 = b.b1",'inner');
$this->db->join("c","a.a1 =c.c1",'inner');