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