Question

我试图将两个不同行的值显示在一行中的两列中，但我无法弄清楚如何检索数据。

这就是我的尝试：

SELECT wp_posts.*, wp_postmeta.*
FROM wp_posts
LEFT JOIN wp_postmeta
ON wp_posts.ID = wp_postmeta.post_id
WHERE wp_posts.post_type='product' AND wp_postmeta.meta_key='_sale_price'
OR wp_postmeta.meta_key='_stock'
ORDER BY wp_posts.ID

我显示如下数据：

foreach($sth as $row)
{
?>
 <tr>
  <td><?php echo $row["ID"]; ?></td>
  <td><?php echo $row["post_title"]; ?></td>
  <td><?php echo $row["meta_value"]; ?></td>
  <td><?php echo $row["meta_value"]; ?></td>
 </tr>

我得到了这个：

虽然我想说明这一点：

我不确定是否应该在PHP，WP或SQL类别中发布此内容。

Answer 1

使用此代码：

仅用此示例替换您的表

＆＃13;

$sql = "SELECT Customers.CustomerName, Orders.OrderID
FROM Customers
LEFT JOIN Orders
ON Customers.CustomerID=Orders.CustomerID
ORDER BY Customers.CustomerName";

$result = mysqli_query($con, $sql);

while ($row = mysqli_fetch_assoc($result)) {
    <tr>
      <td><?php echo $row["ID"]; ?></td>
      <td><?php echo $row["post_title"]; ?></td>
      <td><?php echo $row["meta_value"]; ?></td>
      <td><?php echo $row["meta_value"]; ?></td>
    </tr>
    ///your code here
}

＆＃13;

Answer 2

您的抓取结果似乎是耦合的，因此我建议您在以下规则中打印抓取结果：

/* Print this when $row is in odd number */
 <tr>
  <td><?php echo $row["ID"]; ?></td>
  <td><?php echo $row["post_title"]; ?></td>
  <td><?php echo $row["meta_value"]; ?></td>

/* Print this when $row is in even number */
  <td><?php echo $row["meta_value"]; ?></td>
 </tr>

最后，根据您上面提供的样本数据，您会发现它打印的第一个foreach

＆＃34;＃＆＃34; =＆＃39; 285＆＃39;

＆＃34;喃＆＃34; =＆＃39; Bouquet Opalin＆＃39;

＆＃34; Prix HT＆＃34; =＆＃39; 25＆＃39;

打印的第二个foreach：

＆＃34;库存＆＃34; =＆＃39; 9＆＃39;

我为你做了这个例子，点击下面的链接。

For your reference

/* added at 2018-04-26 */

<?php
    /*  include your dbconfig   */
    include_once('../sit/dbConfig.php');

    $dbConfig = new dbConfig();

    $query = array();
    $query[0] = "SELECT * FROM wp_posts WHERE 1;";

    $column = " ID, post_title, meta_value ";
    $table = " wp_posts ";

    $arr = array();
    $arr = $dbConfig->sqlSelect1($column, $table);

    echo "<pre>";
    echo "1) Print raw array data which get from DB" . "<br><br>";
    print_r( $arr );
    echo "</pre>";
    echo "<br><br>";
?>  


<?php
    echo "<pre>";
    echo "2) Print in table format" . "<br><br>";

    echo "<table border='1' width=device-width >";

    echo "<tr>";
    echo "<td>#</td>";
    echo "<td>Nom</td>";
    echo "<td>Prix HT</td>";
    echo "<td>Stock</td>";
    echo "</tr>";

/* Print this when $row is in even number */
    foreach ($arr as $row => $key) {
        if ($row % 2 == 0) {
            echo "<tr> <td>";
                    echo $key["ID"];
            echo "</td> <td>";
                    echo $key["post_title"];
            echo "</td> <td>";
                    echo $key["meta_value"];
            echo "</td>";
        }


/* Print this when $row is in odd number */
        if ($row % 2 == 1) {
            echo "<td>";
                    echo $key["meta_value"];
            echo "</td> <tr>";
        }
    }

    echo "</table>";
    echo "</pre>";
?>

在同一个表中的同一列中回显不同的值

2 个答案: