The method cachePageExecute() will select the supplied $pageNumber from a a possibly cached recordset, given that it is paginated in pages of $rowsPerPage rows. It also saves two boolean values saying if the given page is the first and/or last one of the recordset.

$SQL = "SELECT * FROM Orders";
/*
* Gets the second page of records, based on 15 records per page
*/
$result = $db->cachePageExecute(3600,$SQL,15,2);
 
print_r($result->getAll());