小编Kru*_*sai的帖子

我有下面的表结构

Create Trains (
id int primary key,
origin varchar not null,
dest varchar not null,
departure_time varchar not null)

Create Passengers(
id int primary key,
origin varchar not null,
dest varchar not null,
departure_time varchar not null)

Trains
id  origin  dest  time
10  Beg     knp   10:20
20  Beg     knp   7:40
30  Del     Sin   12:05
40  Ghr     poh   13:40
50  Del     Sin   18:05

Passengers
id  origin  dest  time
101  Beg     knp   10:20
201  Beg     knp   7:00
301  Del     Sin   12:00 …