从数据库检索数据时出现数据检索问题

Question

当我检索输入的表单数据时，数据库中已经存在的数据也会与输入的数据一起打印。在多组输入字段中多次输入时，出现另一个错误。插入数据时出错。您的SQL语法有误；请查看与您的MariaDB服务器版本相对应的手册以获取正确的语法。

<?php
$con = mysqli_connect("localhost", "root", "", "cv-builder1")or die($mysqli_error($con));
$sql="insert into fields (`name`, `email`, `profession`, `location`, `content`) values('".$_POST['name']."','".$_POST['email']."','".$_POST['profession']."','".$_POST['place']."','".$_POST['summary']."')";
mysqli_query($con,$sql) or die("Error inserting data.".mysqli_error($con));
if(isset($_POST['site'])){
    $site =  $_POST['site'];
    $url  =  $_POST['url'];
    $query = '';
    for($i = 0; $i<count($site); $i++){
        $site_name = mysqli_real_escape_string($con, $site[$i]);
        $url_name = mysqli_real_escape_string($con, $url[$i]);
        if ($site_name !='' && $url_name !=''){
             $query .='INSERT INTO url (`site`, `http`) VALUES ("'.$site_name.'", "'.$url_name.'")';
        }    
    } 
    mysqli_query($con, $query) or die("Error inserting data.".mysqli_error($con));   
}
if(isset($_POST['school'])){
    $ins = $_POST['school'];
    $qual = $_POST['edu'];
    $date = $_POST['date'];
    $note = $_POST['desc'];
    $query ='';
    for($i=0; $i<count($ins); $i++){
        $ins_name = mysqli_real_escape_string($con,$ins[$i]);
        $profession = mysqli_real_escape_string($con,$qual[$i]);
        $dateto = mysqli_real_escape_string($con,$date[$i]);
        $content = mysqli_real_escape_string($con,$note[$i]);
        if($ins_name !='' && $profession !='' && $dateto !='' && $content !=''){
            $query .='INSERT INTO education (`name`, `qualification`, `date`, `note`) VALUES ("'.$ins_name.'", "'.$profession.'", "'.$dateto.'", "'.$content.'")';
        }
    }
    mysqli_query($con,$query) or die("Error inserting data.".mysqli_error($con));
}
if(isset($_POST['emp'])){
    $emp = $_POST['emp'];
    $title = $_POST['job'];
    $date1 = $_POST['date1'];
    $note1 = $_POST['desc1'];   
    $query ='';
    for($i=0; $i<count($emp); $i++){
        $emp_name=mysqli_real_escape_string($con,$emp[$i]);
        $title_name=mysqli_real_escape_string($con,$title[$i]);
        $dateto1=mysqli_real_escape_string($con,$date1[$i]);
        $content1=mysqli_real_escape_string($con,$note1[$i]);   
        if($emp_name !='' && $title_name !='' && $dateto1 !='' && $content1 !=''){
            $query .='INSERT INTO  experience (`empolye`, `job`, `date`, `note`) VALUES ("'.$emp_name.'", "'.$title_name.'", "'. $dateto1.'", "'.$content1.'")';
        }
    }
    mysqli_query($con,$query) or die("Error inserting data.".mysqli_error($con));
}

？>

<div id="line">
    <hr style="margin-top:20px;" color="#009933" size="8" width="90%"/>
</div>
<div id="total">
<div>
    <?php
     $query="SELECT * FROM `fields`";
     $result=mysqli_query($con,$query) or die("Error fetching data.".mysqli_error($con));
     $details=mysqli_fetch_assoc($result);
     mysqli_free_result($result);
   ?>      
   <div>
       <h1 id="my"><?php echo $details['name']; ?></h1>
   </div>
   <div>
        <h2 id="made"><?php echo $details['profession']; ?></h2>
   </div>
   <div>
       <pre id="text"><?php echo  $details['location']; ?></pre>
   </div>
   <div>
       <p class="email"><?php echo $details['email']; ?></p>
   </div>
   <h2>Reasume Contant</h2>
   <div>
      <p id="content"><?php echo $details['content']; ?></p>
   </div>
</div>    
<h2>URL</h2>
<div class="url">
    <?php
        $query="SELECT * FROM `url`";
        $result=mysqli_query($con,$query) or die("Error fetching data.".mysqli_error($con));
        while($http=mysqli_fetch_assoc($result))
        {
    ?>
    <ul style="list-style-type:none;padding-left:0%;">
        <li><?php echo $http['site']; ?></li>
        <li><?php echo $http['http']; ?></li>
    </ul>
    <?php
        }
        mysqli_free_result($result);
    ?>
</div>
<h2>Education</h2>
<div class="edu">
    <?php
        $query="SELECT * FROM `education`";
        $result=mysqli_query($con,$query) or die("Error fetching data.".mysqli_error($con));
        while($edudetails=mysqli_fetch_assoc($result))
        {
    ?>
    <ul style="list-style-type:none;padding-left:0%;">
        <li><?php echo $edudetails['name']; ?></li>
        <li><?php echo $edudetails['qualification']; ?></li>
        <li><?php echo $edudetails['date']; ?></li>
        <li><?php echo $edudetails['note']; ?></li>
    </ul>
    <?php
        }
        mysqli_free_result($result);
    ?>
</div>
<h2>Experience</h2>
<div>
   <?php
        $query="SELECT * FROM `experience`";
        $result=mysqli_query($con,$query) or die("Error fetching data.".mysqli_error($con));
        while($empdetails=mysqli_fetch_assoc($result))
        {
    ?> 
        <ul style="list-style-type:none;padding-left:0%;">
            <li><?php echo $empdetails['empolye']; ?></li>
            <li><?php echo $empdetails['job']; ?></li>
        </ul>    
        <dd>    
            <li><?php echo $empdetails['date']; ?></li>
            <li><?php echo $empdetails['note']; ?></li>
        </dd>  
    <?php
        }
        mysqli_free_result($result);    
    ?>  
</div>
</div>