[英]Merge data from different rows in one cell
需要一些帮助,将来自同一订单 ID 的购买产品的名称存储在 1 个单元格中(尝试将获得的数据输出到 excel 文件)。 例子:
产品订购表:
orders_id | products_name
100 | LCD Monitor
101 | Laptop Intel Processor
101 | Gaming Keyboard
预期输出
orders_id | products_name
100 | LCD Monitor
101 | Laptop Intel Processor<br>Gaming Keyboad
PHP代码
$query = "SELECT * FROM orders_products";
$result = mysqli_query($connect, $query);
while($row = mysqli_fetch_array($result))
{
$output .= '
<tr>
<td align="left">'.$row["orders_id"].'</td>
<td align="left">'.$row["products_name"].'</td>
</tr>
';
}
您可以将GROUP_CONCAT()与 GROUP BY 一起使用以获得预期结果:
SELECT
orders_id,
GROUP_CONCAT(
DISTINCT products_name ORDER BY products_name ASC SEPARATOR ' <br> '
) AS products_name
FROM
orders_products
GROUP BY orders_id;
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