我有一个数据库，它包含四个表（为了安全起见，我给了他们迪士尼角色名称），名为huey，dewey，lewey和uncledonald。
我想从dewey表中的deweysays列中获取数据，hueyay表中的hueysays和lewey表中的leweysays显示在表uncledonald中的相应列中。参见附图，看看我的意思。
我已经尝试了以下代码并获得了我想要的结果，但只获得了一次。之后，我在dewey，huey和lewey表中获取数据，但在uncledonald table中没有其他内容。
<?php
//Let's see whether the form is submitted
if (isset ($_POST['submit'])) {
$con=mysqli_connect("localhost","root","root","provingground");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql = "INSERT INTO dewey (lot_id, deweysays) VALUES (0, '{$_POST['deweyspeak']}');";
$sql .= "INSERT INTO huey (cust_id, hueysays) VALUES (0, '{$_POST['hueyspeak']}');";
$sql .= "INSERT INTO lewey (personal_id, leweysays) VALUES (0, '{$_POST['leweyspeak']}');";
$sql .= "INSERT INTO uncledonald (deweysays) SELECT deweysays FROM dewey ";
$sql .= "INSERT INTO uncledonald (hueysays) SELECT hueysays FROM huey ";
$sql .= "INSERT INTO uncledonald (leweysays) SELECT leweysays FROM lewey ";
// Execute multi query
if (mysqli_multi_query($con,$sql)){
print '<p> The Ducks Have Spoken.</p>';
} else {
die ('<p>Could not add entry because:<b>' . mysqli_error() . '</b>.</p><p>The query being run was: ' . $sql . '</p>');
}
}
mysqli_close($con);
?>
我的$ sql查询中是否缺少某些内容给uncledonald？请帮忙！