Ajax call returns nothing - php

Question

I am trying to make an ajax call on click on anchor tag dynmically generated from $.each loop for a JSON response.
For Information : #records is my table and .update is the class of anchor tag in that table.
Please be informed that the table is generated dynamically.
Now the problem is that my ajax call is returning nothing even i have checked it error: but no response received. I have tried alerting my var data just before the ajax call and it worked.So the problem starts from the ajax call. Moreover, my server side code is running fine.
// Update existing customers
$("#records").on('click', ".update", function() {
var data = '?'+ $(this).attr('id');
$.ajax({
type: "GET",
url: "viewcustomers.php",
data: data,
success: function(response) {
console.log(response);
}
});
});
Thanks in advance.
For reference below is the code that generates the table.
// Function to make datagrid
function getRecords() {
$.getJSON("viewcustomers.php", function(data) {
var items = [];
var xTd = '';
var xTr = '';
$.each(data, function(key, val) {
var c = 0;
var id = 0;
$.each(val, function(key1, val1) {
if (c == 0)
{
id = val1;
}
c++;
xTd += '<td>' + val1 + '</td>';
});
xTd += '<td>Edit</td>';
xTd += '<td>Delete</td>';
xTr = '<tr>' + xTd + '</tr>';
items.push(xTr);
xTd = '';
xTr = '';
});
$("#records").append(items);
});
}
Updated the server side code:
page url : localhost/hotel/viewcustomers.php
/**
* Fetch single row for the purpose of update / delete.
*/
if(isset($_GET['update'])){
$customer = new Customers;
$Id = $_GET['update'];
$customer_single = $customer->View_Single_Customer($Id);
echo json_encode($customer_single);
unset($customer);
}

Answer 1

This line is not used the right way var data = '?'+ $(this).attr('id');
Change it like this: var my_id = $(this).attr('id');
Then update the line data: data with data : {id:my_id}
Complete code :
$("#records").on('click', ".update", function() {
var my_id = $(this).attr('id');
$.ajax({
type: "GET",
url: "viewcustomers.php",
data : {id : my_id},
success: function(response) {
console.log(response);
}
});
});
Or do it like this:
$("#records").on('click', ".update", function() {
var param = '?id='+ $(this).attr('id'); /*notice that I have added "id=" */
$.ajax({
type: "GET",
url: "viewcustomers.php" + param,
/* remove the data attribute */
success: function(response) {
console.log(response);
}
});
});

Answer 2

Modify it as
$("#records").on('click', ".update", function() {
var request = '?id='+ $(this).attr('id');
$.ajax({
type: "GET",
url: "viewcustomers.php" + request,
success: function(response) {
console.log(response);
}
});
});