Question

我正在使用codeigniter并使用jquery datatable进行列表。在codeigniter中我使用了数据库，我必须在我的sql查询中使用order by和union

mysql查询看起来像

SELECT date_format(cp_cuspaydate, '%d-%m-%Y %h:%i:%s %p') as transdate,cp_cusaccno as accno,'Purchase' as particulars,cp_cusamount as amount,
cp_qty as crqty,'-' as drqty, '' as blanceqty
FROM chf_customerpayments
WHERE cp_cusid = 22
UNION
SELECT date_format(credm_reqdate, '%d-%m-%Y %h:%i:%s %p') as transdate,credm_accno as accno,'Redeem' as particulars,'-' as amount,
'-' as crqty,credm_weight as drqty, '' as blanceqty
FROM chf_customerredeemrequest
WHERE credm_cusid = 22 AND credm_status !=2
ORDER BY STR_TO_DATE(transdate,'%d-%m-%Y %h:%i:%s %p') asc;

我需要生成数据表，为此我尝试了以下代码

$this->datatables
              ->select("date_format(cp_cuspaydate, '%d-%m-%Y %h:%i:%s %p') as transdate,cp_cusaccno as accno,'Purchase' as particulars,cp_cusamount as amount,
cp_qty as crqty,'-' as drqty, '' as blanceqty", false)
              ->from('chf_customerpayments')
              ->where('cp_cusid',$this->session->userdata('user_id'))
              ->union('chf_customerredeemrequest')
              ->select("date_format(credm_reqdate, '%d-%m-%Y %h:%i:%s %p') as transdate,credm_accno as accno,'Redeem' as particulars,'-' as amount,
'-' as crqty,credm_weight as drqty, '' as blanceqty", false)
               ->where('credm_cusid = '.$this->session->userdata('user_id').' credm_status !=2');
              echo $this->datatables->generate();

但是数据库库中没有联合函数。如何为我的查询生成数据表。请提前帮助任何人，

Answer 1

对于codeigniters活动记录，特别是在嵌套，联合等情况出现时，不可能进行稍微复杂的查询（例如此查询）。

使用$this->db->query("...");来运行此查询＆＃34;旧式的方式＆＃34;。

请务必通过$this->db->escape(variable)

转义您的数据

主要在这种情况下，编码器的活动记录不是设计为具有多个＆＃34;选择＆＃34;在一个查询中。这意味着即使你添加＆＃34; union＆＃34;关键字（作为评论建议）它将所有＆＃34;选择＆＃34;在一个声明中。

Answer 2

我会单独执行两个查询$ query1＆amp; $ QUERY2。然后合并结果集，如下所示：

$ union = array_merge（$ query1，$ query2）;

Codeigniter Datatable Union和Order by

2 个答案: