public Phalcon\Mvc\Model\Query\Builder join (string $model, [string $conditions], [string $alias], [string $type])
Adds an INNER join to the query
// Inner Join model 'Robots' with automatic conditions and alias
$builder->join('Robots');
// Inner Join model 'Robots' specifing conditions
$builder->join('Robots', 'Robots.id = RobotsParts.robots_id');
// Inner Join model 'Robots' specifing conditions and alias
$builder->join('Robots', 'r.id = RobotsParts.robots_id', 'r');
// Left