mysql - 如何将表从一台服务器更新到另一台服务器？

Question

我需要从一台服务器更新到另一台服务器，并且只能访问下面的代码。 我想知道错误在哪里。

如果分离代码完美的话。

<?PHP
$db_host1     = "10.0.0.101";
$db_user1     = "dns";
$db_password1 = "123456";
$db_name1     = "dns";
$db_connect1  = mysqli_connect($db_host1, $db_user1, $db_password1, $db_name1);
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$db_host2     = "10.0.0.102";
$db_user2     = "dns";
$db_password2 = "123456";
$db_name2     = "dns";
$db_connect2  = mysqli_connect($db_host2, $db_user2, $db_password2, $db_name2);
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

mysqli_query($db_connect2,"UPDATE ipserver SET ipsserver = ($db_connect1,"SELECT ipsserver FROM ipserver WHERE idserver = '11'") WHERE idserver = '11'");

mysqli_close($db_connect1);
mysqli_close($db_connect2);
?>

感谢@Jon Dinham 帮助我解决问题

我将把已经更正的脚本放上

<?PHP
$db_host1     = "10.0.0.101";
$db_user1     = "dns";
$db_password1 = "123456";
$db_name1     = "dns";
$db_connect1  = mysqli_connect($db_host1, $db_user1, $db_password1, $db_name1);
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$db_host2     = "10.0.0.102";
$db_user2     = "dns";
$db_password2 = "123456";
$db_name2     = "dns";
$db_connect2  = mysqli_connect($db_host2, $db_user2, $db_password2, $db_name2);
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$result = mysqli_query(
$db_connect1,
"SELECT ipsserver FROM ipserver WHERE idserver='11'"
);

$rows = mysqli_fetch_array($result,MYSQLI_NUM);

foreach ($rows as $index=>$row) {
$ipsserver = $row;

mysqli_query(
$db_connect2,
"UPDATE ipserver SET ipsserver='$ipsserver' WHERE idserver='11'"
);
}

mysqli_close($db_connect1);
mysqli_close($db_connect2);
?>

Answer 1

您应该设置 MySQL 复制(主/从)并仅在主数据库上执行查询。请参阅文档:http://dev.mysql.com/doc/refman/5.1/en/replication-howto.html

对于仅 1 次查询，替换行:

mysqli_query($db_connect2,"UPDATE ipserver SET ipsserver = ($db_connect1,"SELECT ipsserver FROM ipserver WHERE idserver = '11'") WHERE idserver = '11'");

使用此代码:

$result = mysqli_query(
  $db_connect1,
  "SELECT ipsserver FROM ipserver WHERE idserver='11'"
);

while ($row=$result->fetch_assoc()) {
  $ipsserver = $row["ipsserver"];

  mysqli_query(
    $db_connect2,
    "UPDATE ipserver SET ipsserver='$ipsserver' WHERE idserver='11'"
  );
}