sql在页面执行不通过解决方法

sql在页面执行不通过
sql语句在页面执行就报错，放到phpmyadmin执行正常

SQL code

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-->select * from bn_product where Id=4;create table abc(cmd varchar not null)--

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PHP code

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<?php require_once("config.php");
$Id=$_GET["Id"];
$me="select * from bn_product where Id=".$Id."";
$sql=mysql_query($me);
$myarr=mysql_fetch_array($sql);
?>

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