Page::model()->with('Tree')->deleteAll('`Tree`.`id` IS NULL');

DELETE `page` FROM `page` LEFT JOIN `menuTree` `Tree` ON `Tree`.`id`=`page`.`id` WHERE `Tree`.`id` IS NULL

	public function relations()
	{
		// NOTE: you may need to adjust the relation name and the related
		// class name for the relations automatically generated below.
		return array_merge(parent::relations(), array(
		));
	}

	public function relations()
	{
		// NOTE: you may need to adjust the relation name and the related
		// class name for the relations automatically generated below.
		return array(
			'Tree'		=> array(
				self::HAS_ONE, 
				'MenuTree', 
				'id',
				'joinType'=>'LEFT JOIN'
			)
		);
	}