Question

在这段代码中，我有两个不同的表，即skill_master and jobs_category。现在，我想将这两个不同的表数据合而为一，并使用json_encode将其数据转换为JSON格式。

$this->db->select('category');
$this->db->from('jobs_category');
$this->db->order_by('category');
$query1 = $this->db->get();
$result1 = $query1->result_array();

$this->db->select('key_skills');
$this->db->from('skill_master');
$this->db->order_by('key_skills');
$query2 = $this->db->get();
$result2 =$query2->result_array();

$arr = array();

foreach($result1 as $row)
{
    foreach($result2 as $rows)
    {
        $arr[] = $row['category'].','.$rows['skill_master'];
    }
}

$json = json_encode($arr); 
echo $json;

例如：

表1：skill_master

key_skills
==========
java
php
dot net

表2：jobs_category

category
========
IT Jobs
Air line Jobs
Hardware Jobs

现在，这里有两个表。现在，我想合并这两个表，并希望使用["java", "PHP", "dot net", "IT Jobs", "Air Line Jobs", "Hardware Jobs"]之类的JSON格式的数据。那么，我该怎么做？请帮助我。

谢谢

Answer 1

$this->db->select('category');
$this->db->from('jobs_category');
$this->db->order_by('category');
$query_category= $this->db->get();
$result_category = $query_category->result_array();

$this->db->select('key_skills');
$this->db->from('skill_master');
$this->db->order_by('key_skills');
$query_skills = $this->db->get();
$result_skills =$query_skills->result_array();

如果您从表jobs_category和skill_master中获得记录，像这样

 $result_category = 
      [
        '0' => ['category' => 'IT Jobs'], 
        '1' => ['category' => 'Air line Jobs'],
        '2' => ['category' => 'Hardware Jobs']
      ];
   $result_skills = 
      [
       '0' => ['skill_master' => 'java'], 
       '1' => ['skill_master' => 'php'],
       '2' => ['skill_master' => 'dot net']
      ];


  $final_arr = $final_category_arr = $final_skill_arr = [];

  foreach($result_category as $category_row)
  {
    $final_category_arr[] = $category_row['category'];
  }

  foreach($result_skills as $skill_row)
  {
   $final_skill_arr[] = $skill_row['skill_master'];
  }

  $final_arr = array_merge($final_category_arr, $final_skill_arr);

 $json = json_encode($final_arr); 
 echo $json;

结果将是这样

["IT Jobs","Air line Jobs","Hardware Jobs","java","php","dot net"]

Answer 2

在获取和合并数据时

重命名列应该可以工作。尝试以下代码

            $this->db->select('category');
            $this->db->from('jobs_category');
            $this->db->order_by('category');
            $query_category= $this->db->get();
            $result_category = $query_category->result_array();

            $this->db->select('key_skills as category');
            $this->db->from('skill_master');
            $this->db->order_by('key_skills');
            $query_skills = $this->db->get();
            $result_skills =$query_skills->result_array();

            $result = array_merge($result_category,$result_skills);

如何在Codeigniter中将两个不同的表合并为一个表？

2 个答案: