这个代码有有关问题吗？为什么老是创建不了数据库表

这个代码有问题吗？ 为什么老是创建不了数据库表？
$con = mysql_connect("localhost","root","") or die("连接错误");
$ab = mysql_select_db("my_db", $con);
if($ab){
echo "成功了";
}
$sql = "CREATE TABLE `test` (
`id` int(10) NOT NULL auto_increment,
`uid` varchar(10) NOT NULL default '0',
`regdate` date NOT NULL,
`remark` text,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk AUTO_INCREMENT=1 ;

INSERT INTO `test` (`id`, `uid`, `regdate`, `remark`) VALUES
(1, '张三', '2008-07-02', '学生'),
(2, '李四', '2008-07-03', '学生'),
(3, '王五', '2008-07-02', '工人'),
(4, '赵六', '2008-07-01', '学生');
";
$abc = mysql_query($sql,$con);
if($abc){
echo "建立成功";
}else {
echo "失败了";
}


?>

------解决方案--------------------

$con = mysql_connect("localhost","root","") or die("连接错误");

 $ab = mysql_select_db("my_db", $con);

 if($ab){

 echo "成功了";

 }

  $sql = "CREATE TABLE `test` (

   `id` int(10) NOT NULL auto_increment,

   `uid` varchar(10) NOT NULL default '0',

   `regdate` date NOT NULL,

   `remark` text,

   PRIMARY KEY  (`id`)

 ) ENGINE=InnoDB  DEFAULT CHARSET=gbk AUTO_INCREMENT=1 ;

  $abc = mysql_query($sql,$con);

   if($abc){

    echo "建立成功";

   }else {

    echo "失败了";

   }

$sql1="INSERT INTO `test` (`id`, `uid`, `regdate`, `remark`) VALUES

 (1, '张三', '2008-07-02', '学生')"

$result=mysql_query($sql1);

if($result){

    echo "插入数据成功";

}

------解决方案--------------------
把$abc的mysql错误信息输出出来看看

PS, 12行少个结束双引号