使用php返回GROUP_CONCAT('column x')值 [英] Using php to return GROUP_CONCAT('column x') values

问题描述

我正在尝试使用PHP将SQL值返回到HTML表中.除最后一列"GROUP _ CONCAT (provision_id)."

外，我能够无问题地填充每一列

相关代码:

<?php

global $wpdb;
$wpdb->show_errors();
$contents = $wpdb->get_results( $wpdb->prepare("SELECT salaries.id, name, remaining, contract_value, GROUP_CONCAT( provision_id ) FROM salaries LEFT JOIN contracts ON contracts.id = salaries.id GROUP BY salaries.id"));

 ?>

   [table header stuff...]

<?php 

    foreach ($contents as $content) {
        ?>   
             <tr>
                    <td><?php echo $content->name ?></td>
                    <td><?php echo $content->remaining ?></td>
                    <td><?php echo $content->contract_value ?></td>
                    <td><?php echo $content->GROUP_CONCAT(provision_id) ?></td>

    <?php }; ?>   

            </tr>

仅回显$content->provision-id也不起作用.

解决方案

为该列使用别名.

I am trying to use PHP to return SQL values into an HTML table. I am able to get every column to populate without a problem except for the last column, "GROUP _ CONCAT (provision_id)."

Relevant code:

<?php

global $wpdb;
$wpdb->show_errors();
$contents = $wpdb->get_results( $wpdb->prepare("SELECT salaries.id, name, remaining, contract_value, GROUP_CONCAT( provision_id ) FROM salaries LEFT JOIN contracts ON contracts.id = salaries.id GROUP BY salaries.id"));

 ?>

   [table header stuff...]

<?php 

    foreach ($contents as $content) {
        ?>   
             <tr>
                    <td><?php echo $content->name ?></td>
                    <td><?php echo $content->remaining ?></td>
                    <td><?php echo $content->contract_value ?></td>
                    <td><?php echo $content->GROUP_CONCAT(provision_id) ?></td>

    <?php }; ?>   

            </tr>

Just echoing $content->provision-id doesn't work either.

解决方案

Use an alias for the column.

GROUP_CONCAT( provision_id ) as pids
...
echo $content->pids

这篇关于使用php返回GROUP_CONCAT('column x')值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！