From: | Bruno Wolff III <bruno(at)wolff(dot)to> |
---|---|
To: | Scott Ford <Scott(dot)Ford(at)bullfrogpower(dot)com> |
Cc: | Michael Fuhr <mike(at)fuhr(dot)org>, pgsql-novice(at)postgresql(dot)org |
Subject: | Re: Alternative to MS Access Last() function |
Date: | 2006-03-01 19:24:39 |
Message-ID: | 20060301192439.GB14141@wolff.to |
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Lists: | pgsql-novice |
On Wed, Mar 01, 2006 at 13:31:28 -0500,
Scott Ford <Scott(dot)Ford(at)bullfrogpower(dot)com> wrote:
> Actually, I think I just figured it out. I'm not sure that I totally
> understand it - I've been passed the problem of converting it from
> someone else. But according to the documentation:
>
> -------------
> The LAST function returns the value of the last record in the specified
> field.
>
> Syntax:
> SELECT LAST(column) AS [expression]
> FROM table
>
> Example:
> SELECT LAST(Age) AS highest_age
> FROM Persons
> ORDER BY Age
> --------------
>
> So I think that I should just be able to use MAX(). Right?
You could more closely mimic this with a custom aggregate that returns the
value it was last input. However, depending on the context, you can probably
rewrite the queries to use max, min, or limit 1 with an an appropiate ordering
to do the same thing.
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