在同一表的同一列中回显不同的值

Question

I'm trying to display the values from two different rows into two columns in a single row but I can't figure out how to retrieve the data.

This is what I tried:

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

I display the data like this:

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>

I'm getting this:

While I'd like to get this:

I'm not sure whether I should post this in the PHP, WP or SQL category.

Answer 1

use this code:

only replace your tables with this example

 $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 } 

Answer 2

It seems that your fetch results are coupled, so I'd suggest that you print the fetch results in the rule below:

/* 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>

In the end, according to the sample data you provide above, you will find that the 1st foreach it prints

"#" = '285'

"Nom" = 'Bouquet Opalin'

"Prix HT" = '25'

2nd foreach it prints:

"Stock" = '9'

I did the example for you, click the link below.

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>";
?>