如何在主键和外键的基础上连接两个表进行搜索？

Question

我有两个表格 table1

ID名称价格

1 name1 100

2 name2 200

表2

id authorityId agency start_date end_date

1 1 agency1 1-2-2015 2-12015

我想在第二个表中搜索哪个值适合我 但是我希望第一个表中的名字是基于外键（table1_id）。我怎么能这样做。任何帮助都会受到赞赏吗？

这是我的代码

控制器：

public function searchResult()
{

    $search_term = array(
    'authorityId' => $this->input->get('authority'),
    'grantVillage' => $this->input->get('village'),
    'startDate' => $this->input->get('startDate'),
    'endDate' => $this->input->get('endDate'));
    //print_r($search_term);
    $data['searchResult'] = $this->grant_model->searchResult($search_term);
    $this->load->view('searchResult',$data);

}

型号：

 public function searchResult($search_term)
    {
           $this->db->select('*');
           $this->db->from('grant_data');
           $this->db->like('authorityId', $search_term['authorityId']);
           $this->db->like('grantVillage', $search_term['grantVillage']);
           $this->db->like('startDate', $search_term['startDate']);
           $this->db->like('certificate', $search_term['certificate']);
           $this->db->like('endDate', $search_term['endDate']);
           $query = $this->db->get();
           return $query->result();
    }