π框架数据库关联查询

$sql = 'select * from example AS ep LEFT JOIN user AS u ON ep.ui
d = u.id  where ep.touid = :userId ORDER BY dateline desc LIMIT :start,:num';
$params = array(':userId' => $userId, ':start' => $start, ':num' => $num);
$rs= DI()->notorm->example->queryAll($sql, $params);