SQL查询到DQL

Question

我有一个很大的查询，我想添加一个子查询来获得住宿的可用性。

这是SQL子查询：

,(SELECT (CASE WHEN count(_days) > 0 THEN 'yes' ELSE 'No' END) as available
FROM
(
  SELECT count(rtd.room_type_id) as _days
    FROM room_type_day as rtd
    WHERE rtd.date IN ('2018-06-20', '2018-06-21', '2018-06-22')
    GROUP BY rtd.room_type_id
    HAVING COUNT(rtd.room_type_id) = 3
) as sub) as availability

有谁能告诉我如何在DQL中转换这个SQL？

Thak you

修改

我尝试使用此更改但每次响应都为空：

,(SELECT (CASE WHEN count(rtd.roomType) > 0 THEN 'yes' ELSE 'no' END)
    FROM AppBundle:RoomTypeDayCancelationConditionAccommodation as RTDCCA2
    LEFT JOIN RTDCCA2.roomTypeDay as rtd
    WHERE rtd.date IN ('2018-06-20', '2018-06-21', '2018-06-22')
    GROUP BY rtd.roomType
    HAVING COUNT(rtd.roomType) = 3
) as disponible