GTFS查询以列出两个站点名称之间的所有出发和到达时间

Question

我是第一次使用GTFS结构，但在查询时遇到了麻烦。我已经将运输数据存储到mysql表中，可以自由查询它们，但是我感觉我在进行太多的查询和for循环以获取最简单的信息。

我想在一个查询中得到的是两个已知站点之间的所有出发时间和到达时间，可能用名称来标识。

这是我到目前为止所涉及的内容，其中涉及一个查询，然后遍历每个trip_id以查找出发和到达站的信息+时间。

查询1 ：

显示在特定方向上从特定始发站出发的所有出发时间。结果将给出出发时间和trip_ids。

SELECT t.trip_id, trip_headsign, departure_time, direction_id, s.stop_name 
FROM stops s, routes r, stop_times st, calendar c, trips t 
WHERE departure_time > "00:00:00" and departure_time < "23:59:59" 
AND r.route_id=1 and s.stop_id = 42 
AND s.stop_id = st.stop_id 
AND st.trip_id = t.trip_id   
AND c.service_id = t.service_id   
AND c.monday=1 and direction_id=1;

结果

+---------+---------------+----------------+--------------+-----------+
| trip_id | trip_headsign | departure_time | direction_id | stop_name |
+---------+---------------+----------------+--------------+-----------+
| 5671498 | Grand Central | 04:43:00       |            1 | Garrison  |
| 5671501 | Grand Central | 05:13:00       |            1 | Garrison  |
| 5671504 | Grand Central | 05:43:00       |            1 | Garrison  |
| 5671506 | Grand Central | 06:08:00       |            1 | Garrison  |
| 5671507 | Grand Central | 06:32:00       |            1 | Garrison  |
| 5671513 | Grand Central | 06:53:00       |            1 | Garrison  |
| 5671516 | Grand Central | 07:18:00       |            1 | Garrison  |
| 5671519 | Grand Central | 07:40:00       |            1 | Garrison  |
| 5671521 | Grand Central | 08:03:00       |            1 | Garrison  |
| 5671523 | Grand Central | 08:32:00       |            1 | Garrison  |
| 5671525 | Grand Central | 08:58:00       |            1 | Garrison  |
| 5671526 | Grand Central | 09:27:00       |            1 | Garrison  |
| 5671529 | Grand Central | 10:24:00       |            1 | Garrison  |
| 5671532 | Grand Central | 11:24:00       |            1 | Garrison  |
| 5671535 | Grand Central | 12:24:00       |            1 | Garrison  |
| 5671537 | Grand Central | 13:24:00       |            1 | Garrison  |
| 5671540 | Grand Central | 14:24:00       |            1 | Garrison  |
| 5671542 | Grand Central | 15:24:00       |            1 | Garrison  |
| 5671543 | Grand Central | 16:22:00       |            1 | Garrison  |
| 5671547 | Grand Central | 17:24:00       |            1 | Garrison  |
| 5671550 | Grand Central | 18:24:00       |            1 | Garrison  |
| 5671552 | Grand Central | 19:26:00       |            1 | Garrison  |
| 5671554 | Grand Central | 20:24:00       |            1 | Garrison  |
| 5671556 | Grand Central | 21:24:00       |            1 | Garrison  |
| 5671557 | Grand Central | 22:24:00       |            1 | Garrison  |
| 5671559 | Croton-Harmon | 23:24:00       |            1 | Garrison  |
+---------+---------------+----------------+--------------+-----------+

查询2 ：

给我所有特定行程的停靠点以及到达时间，请使用上一个查询中的trip_id：

SELECT s.stop_id,stop_lat, stop_lon, stop_name, arrival_time, stop_sequence 
FROM stop_times st JOIN stops s ON s.stop_id=st.stop_id 
WHERE trip_id=5671521;

结果

+---------+-----------+------------+------------------+--------------+---------------+
| stop_id | stop_lat  | stop_lon   | stop_name        | arrival_time | stop_sequence |
+---------+-----------+------------+------------------+--------------+---------------+
|      51 | 41.705839 | -73.937946 | Poughkeepsie     | 07:31:00     |             1 |
|      49 | 41.587448 | -73.947226 | New Hamburg      | 07:41:00     |             2 |
|      46 | 41.504007 | -73.984528 | Beacon           | 07:50:00     |             3 |
|      43 | 41.415283 | -73.958090 | Cold Spring      | 07:58:00     |             4 |
|      42 | 41.381780 | -73.947202 | Garrison         | 08:03:00     |             5 |
|      40 | 41.332601 | -73.970426 | Manitou          | 08:08:00     |             6 |
|      39 | 41.285962 | -73.930420 | Peekskill        | 08:17:00     |             7 |
|      37 | 41.246259 | -73.921884 | Cortlandt        | 08:22:00     |             8 |
|      33 | 41.189903 | -73.882394 | Croton-Harmon    | 08:32:00     |             9 |
|       4 | 40.805157 | -73.939149 | Harlem-125th St. | 09:09:00     |            10 |
|       1 | 40.752998 | -73.977056 | Grand Central    | 09:22:00     |            11 |
+---------+-----------+------------+------------------+--------------+---------------+

我真正想要的是两个站点之间的出发时间和到达时间的列表，例如理论上的结果：

+---------+----------------+----------------+-----------+---------------+--------------+
| trip_id | departure_stop | departure_time | direction | arrival_stop  | arrival_time |
+---------+----------------+----------------+-----------+---------------+--------------+
| 5671521 | Garrison       | 08:03:00       |         1 | Grand Central | 09:22:00     |
| 5671522 | Garrison       | 08:32:00       |         1 | Grand Central | 09:51:00     |    
...etc...

Answer 1

只需将数据连接在一起，stops两次连接就可以开始和结束停止，stop_times两次连接就可以开始和结束stop_times， 我唯一不确定的是它direction_id来自哪里。
请尝试以下查询。 在查询的最后，您可以指定start_s.stop_id和end_s.stop_id，代表要查询数据的两个停靠点。

SELECT t.trip_id,
       start_s.stop_name as departure_stop,
       start_st.departure_time,
       direction_id as direction,
       end_s.stop_name as arrival_stop,
       end_st.arrival_time
FROM
trips t INNER JOIN calendar c ON t.service_id = c.service_id
        INNER JOIN routes r ON t.route_id = r.route_id
        INNER JOIN stop_times start_st ON t.trip_id = start_st.trip_id
        INNER JOIN stops start_s ON start_st.stop_id = start_s.stop_id
        INNER JOIN stop_times end_st ON t.trip_id = end_st.trip_id
        INNER JOIN stops end_s ON end_st.stop_id = end_s.stop_id
WHERE c.monday = 1 
  AND direction_id = 1
  AND start_st.departure_time > "00:00:00" AND start_st.departure_time < "23:59:59" 
  AND r.route_id = 1
  AND start_s.stop_id = 42
  AND end_s.stop_id = 1

我尝试从此链接查找GTFS结构示例，但找不到任何内容direction_id

指定停止名称而不是AND start_s.stop_id = 42 AND end_s.stop_id = 1
仅使用AND start_s.stop_name = 'Garrison' AND end_s.stop_name = 'Grand Central'