CodeIgniter 获取表计数行答案

【问题标题】：CodeIgniter get table count rowsCodeIgniter 获取表计数行
【发布时间】：2019-09-26 10:16:34
【问题描述】：

我是 CodeIgniter 的新手，我想计算数据库表中的所有行，但我在查询中使用限制，我希望所有计数都没有使用限制，我该怎么办？

我的代码如下：

  $sql = " SELECT intGlCode,fkCategoryGlCode,'C' as acctyp,varEmail,varContactNo as phone,CONCAT(varFirstName,' ',varLastName) as name,dtCreateDate,chrStatus,varMessage as message
  FROM " . DB_PREFIX . "Customer WHERE varEmail='$userEmail'
          UNION 
         SELECT intGlCode,'' as fkCategoryGlCode,'P' as acctyp,varEmail,varPhoneNo as phone,varName as name,dtCreateDate,chrStatus,txtDescription as message FROM  
      " . DB_PREFIX . "Power WHERE varEmail='$userEmail' ORDER BY intGlCode DESC 
     LIMIT $start, $per_page  ";

    $query = $this->db->query($sql)

我使用限制进行分页，但我想从表中获取所有记录。

【问题讨论】：

这是来自 codeigntor 中联合的正确查询吗？

标签： php sql codeigniter

【解决方案1】：

您可以在 UNION 查询的上方和下方添加新列。如下所示。

select (select count(*) from your_query), your_columns from query_above_union 
UNION 
select (select count(*) from your_query), your_columns from query_below_union

your_query = 您当前正在使用的完整实际查询。

虽然我不确定 Codeigniter。但肯定是 SQL。

【讨论】：

【解决方案2】：

* 如果您计算所有数据的所有记录，包括限制，则可以使用此代码。请检查一下。我希望它对你有用。*

$countsql = " SELECT intGlCode,fkCategoryGlCode,'C' as acctyp,varEmail,varContactNo as phone,CONCAT(varFirstName,' ',varLastName) as name,dtCreateDate,chrStatus,varMessage as message
 FROM " . DB_PREFIX . "Customer WHERE varEmail='$userEmail'
      UNION 
     SELECT intGlCode,'' as fkCategoryGlCode,'P' as acctyp,varEmail,varPhoneNo as phone,varName as name,dtCreateDate,chrStatus,txtDescription as message FROM  
  " . DB_PREFIX . "Power WHERE varEmail='$userEmail' ORDER BY intGlCode DESC";
$sql = $countsql. " LIMIT $start, $per_page";  
$totalRecords   = $this->db->query($countsql);
$result["total_rows"] = $totalRecords->num_rows();
$query = $this->db->query($sql);
$result["list"] = $query->result_array();

【讨论】：