php - 如何使用 mysql 查询和 foreach 制作下拉列表？

Question

我有这样的代码

$result1 = mysql_query("select distinct Country  from mtable UNION SELECT DISTINCT MidEstimate FROM mtable");
$row = mysql_fetch_assoc( $result1 );

    echo "<select>";
    foreach($row as $vals)
    {
        echo "<option name='$vals'>$vals</option>";
    }
    echo "</select>";

下拉列表仅显示一个值？我想要此列表中两列的值，请帮我对此进行排序

Answer 1

$result1 = mysql_query("select distinct Country  from mtable UNION SELECT DISTINCT MidEstimate FROM mtable");  

echo "<select>";  
while($row = mysql_fetch_array($result1)){
    echo "<option name=\"$row[0]\">$row[0]</option>";
}
echo "</select>";