Обсуждение: join a lot of columns of two tables
Dear Postgres Users, I have 2 tables... each one has a column called ID (primary keys of each table) the values into each ID column are exactly the same. each table has a lot of other columns (around 50 for each table).... I would like to create a table containing the ID (only one column obviously) and all the other columns of both tables... a simple equi join for each column is simple but how can I join completely the two table on the bases of the column ID??? probably it is a simple question but I don't know how to solve this very simple problem quikly... :-( thanks Ivan -- Ti prego di cercare di non inviarmi files .doc, .xls, .ppt, .dwg. Preferisco formati liberi. Please try to avoid to send me .doc, .xls, .ppt, .dwg files. I prefer free formats. http://it.wikipedia.org/wiki/Formato_aperto http://en.wikipedia.org/wiki/Open_format Ivan Marchesini Department of Civil and Environmental Engineering University of Perugia Via G. Duranti 93/a 06125 Perugia (Italy) e-mail: marchesini@unipg.it ivan.marchesini@gmail.com tel: +39(0)755853760 fax: +39(0)755853756 jabber: geoivan73@jabber.org
On 14/12/06, ivan marchesini <marchesini@unipg.it> wrote: > Dear Postgres Users, > I have 2 tables... > each one has a column called ID (primary keys of each table) > the values into each ID column are exactly the same. > > each table has a lot of other columns (around 50 for each table).... > > I would like to create a table containing the ID (only one column > obviously) and all the other columns of both tables... > > a simple equi join for each column is simple but how can I join > completely the two table on the bases of the column ID??? > > probably it is a simple question but I don't know how to solve this very > simple problem quikly... :-( > thanks > > Ivan > select * from t1 full join t2 on (t1.id=t2.id); you'll end up with the id column from both tables if you don't want that you are going to need to list all the column names. Peter.
On fim, 2006-12-14 at 12:01 +0100, ivan marchesini wrote: > Dear Postgres Users, > I have 2 tables... > each one has a column called ID (primary keys of each table) > the values into each ID column are exactly the same. > > each table has a lot of other columns (around 50 for each table).... > > I would like to create a table containing the ID (only one column > obviously) and all the other columns of both tables... > > a simple equi join for each column is simple but how can I join > completely the two table on the bases of the column ID??? > > probably it is a simple question but I don't know how to solve this very > simple problem quikly... :-( > thanks select * from t1 join t2 USING (id); gnari