基于列 codeigniter 对行进行分组

Question

我想根据列对行进行分组。我附上了我的表格 我试过了，我的问题是，当使用 group_by 时，它只会返回每个用户的一行。我想按 user_id 从这个表组中获取全部数据 型号

 public function get_pdf_print( $start_date, $end_date) {
          $this->db->select('*');
        $this->db->from('jil_invoices');
   $this->db->group_by('jil_invoices.inv_userid');
  $this->db->where('jil_invoices.inv_dated >=', $start_date);
        $this->db->where('jil_invoices.inv_dated <=', $end_date);
  $query = $this->db->get();
return $query->result();
}

Answer 1

如果您想将GROUP BY 与 userid 列一起使用，请注意它不会返回所有行。

我建议您获取所有行，而不是使用 PHP 进行分组，例如：

在您的模型中：

public function get_pdf_print($start_date, $end_date) {
    $this->db->select('*');
    $this->db->from('jil_invoices');
    $this->db->where('jil_invoices.inv_dated >=', $start_date);
    $this->db->where('jil_invoices.inv_dated <=', $end_date);
    $query = $this->db->get();
    return $query->result_array(); // here i am using result_array function will return result into array.
}

在您的控制器中：

$records = $this->model_yourmodel->get_pdf_print($startDate,$endDate);
$userData = array();
foreach ($records as $key => $value) {
    $userData[$value['inv_userid']][] = $value; // get all record against each user
}