From: Michele Petrazzo - Unipex <michele.petrazzo@unipex.it>
To: pgsql-sql@postgresql.org
Subject: inner join and limit
Date: Wed, 26 May 2010 19:34:56 +0200
Message-ID: <4BFD5BC0.90900@unipex.it> (raw)
Hi list,
I have two table that are so represented:
t1:
id int primary key
... other
t2:
id int primary key
t1id int fk(t1.id)
somedate date
... other
data t1:
1 | abcde
2 | fghi
data t2:
1 | 1 | 2010-05-23
2 | 1 | 2010-05-24
3 | 1 | 2010-05-25
4 | 2 | 2010-05-22
5 | 2 | 2010-05-26
I'm trying to create a query where the data replied are:
join t1 with t2 and return only the LIMIT 1 (or N) of the t2, with date
order (of t2).
Data should be:
t1.id | t2.id | t2,somedate
1 | 3 | 2010-05-25
2 | 5 | 2010-05-26
As said, I'm trying, but without success...
Can be done for you?
Thanks,
Michele
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To: pgsql-sql@postgresql.org
Cc: michele.petrazzo@unipex.it
Subject: Re: inner join and limit
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