Question

我第一次使用GTFS结构并且遇到了查询问题。我已经将传输数据传输到mysql表中，可以自由查询它们，但我觉得我做了太多的查询和循环来获取最简单的信息。

我想在单个查询中获得的是两个已知停靠点之间的所有出发时间和到达时间，可能是通过名称识别的。

这是我到目前为止所涉及的内容，其中涉及查询，然后循环遍历每个trip_id以查找出发和到达站信息+次。

查询1 ：

显示特定始发站的所有出发时间，沿特定方向行驶。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 ：

给我一个特定旅行的所有站点及其到达时间，使用上次查询中的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 |
+---------+-----------+------------+------------------+--------------+---------------+

我真正喜欢的是两站之间的出发时间和到达时间列表，例如理论结果：

+---------+----------------+----------------+-----------+---------------+--------------+
| 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，两次加入stops开始和结束停止，并加入stop_times两次开始和结束stop_times，
我唯一不确定的是direction_id来自何处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，它代表您查询数据的两个站点。

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this link查找GTFS结构示例，但在direction_id上找不到任何内容

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

GTFS查询列出两个停止名称之间的所有出发和到达时间

1 个答案: