请问大神，这样写，php的查询是否是执行了两次？

<?php$act=$_GET['act'];$id=$_GET['id'];switch($act){case "del";$del=$dbc->prepare("delete from naszt where 1=1 and id=?");if($del->execute(array($id))){ echo "<script>";echo "$(function() {";echo  "$('.del').click(function() {";echo  " $('#'+$(this).attr('id')).remove()";echo  "})";echo "})";echo "</script>"; }else{	echo  '<script>alert("由于网络原因,删除失败,请重试!");</script>';  }}?><?php $selectSpecialContent=$dbc->prepare("select * from naszt");$selectSpecialContent->execute();?><table align="center" cellspacing="0" cellpadding="0"><tr><th>专题名称</th><th>专题类型</th><th>发表时间</th><th>发表ip</th><th>操作</th></tr><?php while($row=$selectSpecialContent->fetch()){ ?><tr id="<?php echo $row['id']?>"><td><?php echo $row['ztname']?></td><td><?php echo $row['zttype']?></td><td><?php echo $row['zttime']?></td><td><?php echo $row['publiship']?></td><td><button><a href="ztselect.php?id=<?php echo $row['id']?>">查看</a></button><button><a href="upzt.php?act=up&id=<?php echo $row['id']?>">修改</a></button><button class='del' id="<?php echo $row['id']?>"><a href="selectzt.php?act=del&id=<?php  echo $row['id']?>" >删除</a></button></td></tr><?php }; ?></table>