DataTables with database

Is there any example that uses datasource from the database for DataTables :
http://www.datatables.net/examples/api/row_details.html

If so, is there any links that u can give me? Since i'm just an amateur.

I know the data are on this lines :

$(document).ready(function() {
    var table = $('#example').DataTable( {
        "ajax": "../ajax/data/objects.txt",
        "columns": [
            {
                "className":      'details-control',
                "orderable":      false,
                "data":           null,
                "defaultContent": ''
            },
            { "data": "name" },
            { "data": "position" },
            { "data": "office" },
            { "data": "salary" }
        ],
        "order": [[1, 'asc']]
    } );

but how to change them to fetch the data from sql queries specifically? Since don't have any knowledge on ajax.

Thanks for your kind help