La base de datos PhalconPHP se une a ORM

En modelo necesitas crear un método, por ejemplo

/**
 * Returns users which doesn't belong to any organization.
 *
 * @return mixed
 */
public static function getSomething()
{
    $query = User::query()
        ->columns(__NAMESPACE__ . '\Pages.*')
        ->leftJoin(__NAMESPACE__ . '\Sections', __NAMESPACE__ . '\Pages.page_section_id = ps.section_id', 'ps')
        ->where('do something')
        ->execute();

    if ($query->count()) {
        return $query;
    }

    return false;
}