Question

我有这个mysql查询，我是CodeIgniter的新手。如何将此mysql查询转换为CodeIgniter的Active Record？

SELECT chp_destination, cde_name, chp_year, chp_from, chp_to, chp_budget_price_high, 
chp_medium_price_high, chp_luxury_price_high, chp_budget_price_low, chp_medium_price_low, chp_luxury_price_low, chp_timestamp, chp_comment , MAX( chp_timestamp ) AS last_updated, MAX( chp_id )
FROM crm_hotel_price
LEFT JOIN crm_destinations ON cde_id = chp_destination
GROUP BY chp_destination, chp_year
ORDER BY chp_id

Answer 1

试试这个：(Reference)

$this->db->select('chp_destination, cde_name, chp_year, chp_from, chp_to, chp_budget_price_high, chp_medium_price_high, chp_luxury_price_high, chp_budget_price_low, chp_medium_price_low, chp_luxury_price_low, chp_timestamp, chp_comment, MAX(chp_timestamp) AS last_updated, MAX(chp_id)', FALSE);
$this->db->join('crm_destinations', 'cde_id = chp_destination', 'left');
$this->db->group_by('chp_destination, chp_year');
$this->db->order_by('chp_id');
$qry = $this->db->get('crm_hotel_price');
$res = $qry->result(); // or $qry->result_array();

Answer 2

尝试：

$rs = $this->db->select('chp_destination, cde_name, chp_year, chp_from, chp_to, chp_budget_price_high, chp_medium_price_high, chp_luxury_price_high, chp_budget_price_low, chp_medium_price_low, chp_luxury_price_low, chp_timestamp, chp_comment , MAX( chp_timestamp ) AS last_updated, MAX( chp_id )', false)
      ->from('crm_hotel_price')
      ->join('crm_destinations', 'cde_id = chp_destination', 'LEFT')
      ->group_by(array('chp_destination', 'chp_year'))
      ->order_by('chp_id')
      ->get()->result_array();

Answer 3

请尝试以下代码：

 > $this->db->select('chp_destination, cde_name, chp_year, chp_from, chp_to, chp_budget_price_high,

chp_medium_price_high，chp_luxury_price_high，chp_budget_price_low，chp_medium_price_low，chp_luxury_price_low，chp_timestamp，chp_comment，MAX（chp_timestamp）AS last_updated，MAX（chp_id）'）;

$这 - ＆GT; DB-肽从（ 'crm_hotel_price'）;
  $ this-＆gt; db-＆gt; join（'crm_destinations'，'cde_id = chp_destination'，'LEFT'）; //加入另一张桌子
  $这 - ＆GT; DB-＆GT; GROUP_BY（ 'chp_destination，chp_year'）; //用于分组字段
  $ this-＆gt; db-＆gt; order_by（“chp_id”，“asc”）; //用于排序字段值
  $ query = $ this-＆gt; db-＆gt; get（）;
          return $ query-＆gt; result_array（）; //它将返回结果
  并使用此行查看整个SQL查询     echo $ this-＆gt; db-＆gt; last_query（）;

将MySQL查询转换为CodeIgniter中的Active Record

3 个答案: