Sortable table jquery : order by name of first column with jquery,how can i modify this code , i don't have idea , anyone can help me? : 

    oTable_aziende = $('#table_aziende').dataTable({
            "bJQueryUI": true,
            //"sScrollY": 200,
            //"bPaginate": false,
            "bFilter": true,
            "bStateSave" : true, 
            "oLanguage": {
                "sUrl": "../js/dataTables.italian.txt"
            },
            "aoColumns": [
            null,
            null,
            { "bSortable": true },
            { "bSortable": false }
            ],
            "sPaginationType": "full_numbers",
            "fnDrawCallback": function (o) {
                
                window.scrollTo(0,0)
            },
            "aaSorting": [[ 2, "desc" ]]
        //"bRetrieve": true
    });