$sql = "UPDATE tbl_sample SET ".$column_name."='".$text."' WHERE id='".$id."'";

$(document).ready(function(){
  function fetch_data()
  {
       $.ajax({
            url:"dbselect.php",
            method:"POST",
            success:function(data){
                 $('#live_data').html(data);
            }
       });
  }
  fetch_data();
  $(document).on('click', '#btn_add', function(){
       var desc = $('#desc').text();
       var ipadd = $('#ipadd').text();
       var port = $('#port').text();
       var platform = $('#platform').text();

       if(desc == '')
       {
            alert("Enter Description");
            return false;
       }
       if(ipadd == '')
       {
            alert("Enter IP Address");
            return false;
       }

       if(port == '')
       {
            alert("Enter Port Number");
            return false;
       }

       if(platform == '')
       {
            alert("Enter DB Platform");
            return false;
       }
       $.ajax({
            url:"dbinsert.php",
            method:"POST",
            data:{desc:desc, ipadd:ipadd, port:port, platform:platform},
            dataType:"text",
            success:function(data)
            {
                 alert(data);
                 fetch_data();
            }
       })
  });
  function edit_data(id, text, column_name)
  {
       $.ajax({
            url:"dbedit.php",
            method:"POST",
            data:{id:id, text:text, column_name:column_name},
            dataType:"text",
            success:function(data){
                 alert(data);
            }
       });
  }   $(document).on('blur', '.desc', function(){
       var id = $(this).data("id1");
       var desc = $(this).text();
       edit_data(id, desc, "desc");
  });
  $(document).on('blur', '.ipadd', function(){
       var id = $(this).data("id2");
       var ipadd = $(this).text();
       edit_data(id,ipadd, "ipadd");
  });

  $(document).on('blur', '.port', function(){
       var id = $(this).data("id3");
       var port = $(this).text();
       edit_data(id,port, "port");
  });

  $(document).on('blur', '.platform', function(){
       var id = $(this).data("id4");
       var platform = $(this).text();
       edit_data(id,platform, "platform");
  });

  $(document).on('click', '.btn_delete', function(){
       var id=$(this).data("id5");
       if(confirm("Are you sure you want to delete this?"))
       {
            $.ajax({
                 url:"dbdelete.php",
                 method:"POST",
                 data:{id:id},
                 dataType:"text",
                 success:function(data){
                      alert(data);
                      fetch_data();
                 }
            });
       }
    });
 });

<?php
   $connect = pg_connect("host=localhost dbname=dbinv user=postgres          password=moira port=5432");
   $sql = "INSERT INTO "kbc".dbinventory(desc,ipadd,port,platform)
   values ('".$desc."','".$ipadd."','".$port."','".$platform."')";
   if(pg_query($connect, $sql))
   {
  echo 'Data Inserted';
   }
  ?>

<?php
$connect = mysqli_connect("localhost", "root", "", "test_db");
$id = $_POST["id"];
$text = $_POST["text"];
$column_name = $_POST["column_name"];
$sql = "UPDATE tbl_sample SET ".$column_name."='".$text."' WHERE   id='".$id."'";
if(pg_query($connect, $sql))
{
  echo 'Data Updated';
}
?>

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