Re: 2 tables, joins and same name...
От | Thomas Rehlich |
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Тема | Re: 2 tables, joins and same name... |
Дата | |
Msg-id | 3B8FB363.1000509@wtal.de обсуждение исходный текст |
Ответ на | 2 tables, joins and same name... (Marc André Paquin <web@inter-resa.com>) |
Список | pgsql-sql |
Marc André Paquin wrote: > Here is 2 tables: > > airport > --------- > airport_id > name > code > city_id > > destination > ----------- > destination_id > dest_name > ... > airport_dep_id // using airport.airport_id (departure) > airport_arr_id // using airport.airport_id has well (arrival) > > I have 2 columns in the second table that uses the same name column in > the first table... > > I dont know how to formulate my SQL query... I want to select the > destinations in the destination table with not the ID of each airport > but their names. I can do a join with one but with the second one, I > get no results... And this is confusing! May be I'm wrong, but I think you mean something like this one select dest_name , air1.name as airport1 , air2.name as airport2 from destination join airport as air1 on air1.airport_id= destination.airport_dep_id join airport as air2 on air2.airport_id = destination.airport_arr_id Thomas
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