[英]how fetch data from two table in codeigniter by using inner join
[英]Join tables and fetch the data to a table using codeigniter
我有兩個名為verification_details
和verification_questions
數據庫表。 verification_id
在兩個表中很常見。 在verification_details
表中,有一個user_id
場,在此基礎上user_id
字段,一個或多個驗證信息插入到verification_details
表以及基於verification_id
插入一個或多個驗證問題verification_questions
表。 我在模型中使用此代碼進行連接查詢
function get_records() {
$this->db->select("a.criteria_question,a.criteria_answer,a.validation_statement");
$this->db->from("verification_questions as a");
$this->db->join('verification_details as b', 'a.verification_id = b.verification_id');
$query = $this->db->get();
return $query->result();
}
我想要控制器代碼從兩個表中獲取所有數據並將其顯示在表中。
在模型中
function get_records() {
$this->db->select("a.criteria_question,a.criteria_answer,a.validation_statement");
$this->db->from("verification_questions as a");
$this->db->join('verification_details as b', 'a.verification_id = b.verification_id');
$query = $this->db->get();
$result = $query->result_array();
return $result;
}
在控制器中
$data['table'] = $this->Model_name->get_records();
$this->load->view('view_name',$data);
在視野中
<table>
<tr>
<th>Question</th>
<th>Answer</th>
<th>Validation</th>
</tr>
<?php
foreach ( $table as $new_item )
{
?>
<tr>
<td><?php echo $new_item['table field1']?></td>
<td><?php echo $new_item['table field2']?></td>
<td><?php echo $new_item['table field3']?></td>
</tr>
<?php
}
?>
</table>
您可以在模型中創建結果數組並在控制器中使用它。
模型:
function get_records()
{
$this->db->select("a.criteria_question,a.criteria_answer,a.validation_statement");
$this->db->from("verification_questions as a");
$this->db->join('verification_details as b', 'a.verification_id = b.verification_id');
$query = $this->db->get();
$select = array();
foreach ($query->result() as $row) {
$select[] = $row;
}
if (count($select) > 0)
return $select;
return NULL;
}
您可以在控制器中使用此函數來獲取結果數組。
控制器:
$data['result']=$this->modelname->get_records();
$this->load->view('your_view', $data);
最后,您必須將結果變量傳遞給視圖才能在表格中顯示。
視圖:
<table><tr><td>Question></td></tr>
if(count($result)>0){
foreach($result as $row){ ?>
<tr><td><?= $row->criteria_question; ?></td></tr>
<?php}
} ?>
</table>
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