方法一:$this->db->query("sql 語句"); 直接寫sql語句sql
方法二:this
#多表關聯查詢
$data=$this->db->from('goods')
->join('shop','shop.shopid=goods.shopid')
->join('category','category.cid=goods.cid')
->join('locality','locality.lid=goods.lid')
->get()->result_array();
return $data;ci