Re: SELECT from multiple tables (not join though)
От | Madison Kelly |
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Тема | Re: SELECT from multiple tables (not join though) |
Дата | |
Msg-id | 41E2BBBD.3010409@alteeve.com обсуждение исходный текст |
Ответ на | SELECT from multiple tables (not join though) (Madison Kelly <linux@alteeve.com>) |
Список | pgsql-general |
Typo, that should have been: SELECT a.file_name, b.file_name, c.file_name FROM file_info_1 a, file_info_2 b, file_info_3 c WHERE a.file_parent_dir='/' AND b.file_parent_dir='/' AND c.file_parent_dir='/'; (All the WHERE... are the same) Madison Madison Kelly wrote: > Hi all, > > I have another question, I hope it isn't too basic. ^.^ > > I want to do a select from multiple tables but not join them. What I > am trying to do is something like this (though this doesn't work as I > need): > > SELECT a.file_name, b.file_name, c.file_name FROM file_info_1 a, > file_info_2 b, file_info_3 c WHERE a.file_name='/' AND > b.file_parent_dir='/' AND c.file_parent_dir='/'; > > That returns every combination of the results from the three tables > which is a huge number. What I need is to return all of the matches in > all of the tables in a single column. Once I have all the matches in one > column the next trick is to sort the combined results (any tips there?). > > I hope the question was clear. Please let me know if it wasn't. Thanks! > > Madison > > ---------------------------(end of broadcast)--------------------------- > TIP 7: don't forget to increase your free space map settings >
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