Combine two columns in to one value for dropdown?

pacificshack

Hi,
I have a datatable I use for sorting out listings. I have a table which has two columns for:
- From
- From2
These columns contain different data which I need to combine.
In my JS, I am able to pass through the first column OK, and some of the data from the second column, but not all of it.
How can I combine the data from both fields in to one, and the net result being a dropdown menu with both values?

$(document).ready(function() {
    // var for data tables filtering
    var oTable = $('#dt_basic_filtering').DataTable({
        "sPaginationType": "full_numbers",
        "iDisplayLength" : 25,
        "bSort": true,
        "aaSorting": [],
        "columns": [
            { name: 'from' },
            { name: 'from2' },
            { name: 'table' }
        ]
    });
    
    // Create selects in footer of table
    $("#dt_basic_filtering tfoot th.select").each( function ( i ) {
        
        if ($(this).hasClass('selectFrom')) {
            var select = $('<select><option class="start" value="">- Select all -</option></select>')
            .appendTo( $(this).empty() )
            .on('change', function () {
                var val = $(this).val();
                oTable.column( 'from2:name' ).search( val ? ''+$(this).val()+'' : val, true, false )
                .draw();
            });
        }
        if ($(this).hasClass('selectFrom2')) {
            var select = $('<select><option class="start" value="">- Select all -</option></select>')
            .appendTo( $(this).empty() )
            .on('change', function () {
                var val = $(this).val();
                oTable.column(i).search( val ? '^'+$(this).val()+'$' : val, true, false )
                .draw();
            });
        }
    
        oTable.column( i ).data().unique().sort().each( function ( d, j ) {
            select.append( '<option class="hasValue" value="'+d+'">'+d+'</option>' );
            
        } );    
        
    
    });
        
    // Hide second from field
    $("#dt_basic_filtering tfoot th.selectFrom2 select").addClass('hidden');
    
        
});