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我從一個文本文件,我讀入一個Postgres 9.1表中的數據,數據是這樣的:後在午夜時間的PostgreSQL
451,22:30:00,22:30:00,San Jose,1
451,22:35:00,22:35:00,Santa Clara,2
451,22:40:00,22:40:00,Lawrence,3
451,22:44:00,22:44:00,Sunnyvale,4
451,22:49:00,22:49:00,Mountain View,5
451,22:53:00,22:53:00,San Antonio,6
451,22:57:00,22:57:00,California Ave,7
451,23:01:00,23:01:00,Palo Alto,8
451,23:04:00,23:04:00,Menlo Park,9
451,23:07:00,23:07:00,Atherton,10
451,23:11:00,23:11:00,Redwood City,11
451,23:15:00,23:15:00,San Carlos,12
451,23:18:00,23:18:00,Belmont,13
451,23:21:00,23:21:00,Hillsdale,14
451,23:24:00,23:24:00,Hayward Park,15
451,23:27:00,23:27:00,San Mateo,16
451,23:30:00,23:30:00,Burlingame,17
451,23:33:00,23:33:00,Broadway,18
451,23:38:00,23:38:00,Millbrae,19
451,23:42:00,23:42:00,San Bruno,20
451,23:47:00,23:47:00,So. San Francisco,21
451,23:53:00,23:53:00,Bayshore,22
451,23:58:00,23:58:00,22nd Street,23
451,24:06:00,24:06:00,San Francisco,24
距離的通勤鐵路線的時間表,加州火車。我試圖查詢車站,以獲得火車的到達和離開時間。我在幾個月前在MySql上做了這個,而我得到了
select * from trains as a, trains as b where a.trip_id=b.trip_id and a.st
op_id='San Antonio' and b.stop_id='San Carlos' and a.arrival_time < b.arrival_ti
me;
到目前爲止這麼好,很直接。然而,當我試圖將數據複製到postgres數據庫時,我發現有些時間在午夜之後,24或25:00:00發生。但是,如果我將它們更改爲00:00:00和01:00:00的東西,會不會與查詢混亂?午夜後的時間似乎在開始時間之前? MySql顯然沒有問題,我不知道該怎麼做。我想我應該使用最後一列,或者將時間轉換爲不考慮PM/AM的事情?