Remove jquery datatable sorting on particular column

<script>

    $j = jQuery.noConflict();

    $j(document).ready(function () {

        //For data table

        $j('#example').DataTable({

            "iDisplayLength": 100,

            // "bProcessing": true,

            // "bSort": false

            "aoColumnDefs": [

         { 'bSortable': false, 'aTargets': [2,6,7] }

            ]

       

       

        });

    

    });