Re: SQL problem: bank account

From: Jonathan Gardner <jgardner(at)jonathangardner(dot)net>
To: "listrec" <listrec(at)epecon(dot)de>, "Erik G(dot) Burrows" <eburrows(at)erikburrows(dot)com>, <pgsql-sql(at)postgresql(dot)org>
Subject: Re: SQL problem: bank account
Date: 2003-06-02 16:40:58
Message-ID: 200306020940.58614.jgardner@jonathangardner.net
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On Monday 02 June 2003 00:49, listrec wrote:
> How about:
>
> select max(transaction_id) from bank_account group by customer_id
>

And if you want the rest of the data in the rows:

SELECT b.*
FROM bank_account b
JOIN (
SELECT max(transaction_id) AS transaction_id
FROM bank_account
GROUP BY customer_id
) AS subselect ON subselect.transaction_id=b.transaction_id
;

I use a similar query here at work to find the first time a guy has visited
our site through an advertiser.

--
Jonathan Gardner <jgardner(at)jonathangardner(dot)net>
(was jgardn(at)alumni(dot)washington(dot)edu)
Live Free, Use Linux!

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