select user id

SCAMP

Sorry my english bad.I Use server side

$(document).ready(function() {
$('#example').dataTable( {
"processing": true,
"serverSide": true,
"ajax": {
"url": "scripts/server_processing.php",
"data": function ( d ) {
d.length = "1";
// d.custom = $('#myInput').val();
// etc
}
}
} );
} );

but I cant not limit mysql rows and select where user id