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Re: Get the max(value1, value2, value3) from a table - Mailing list pgsql-sql

From Josh Williams
Subject Re: Get the max(value1, value2, value3) from a table
Date
Msg-id 1199745537.5877.9.camel@godzilla.local.scalefeather.com
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In response to Get the max(value1, value2, value3) from a table  (Emi Lu <emilu@encs.concordia.ca>)
Responses Re: Get the max(value1, value2, value3) from a table  ("Scott Marlowe" <scott.marlowe@gmail.com>)
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On Mon, 2008-01-07 at 17:03 -0500, Emi Lu wrote:
> select ?max?(col1, col2, col3) as result;
> will return
> 
> result
> -------
> 5
> 8
> 12
> 
> (3 rows)

8.1 (I believe?) introduced GREATEST(), which does precisely what you're
looking for.

But if 8.0 is a must, you'll probably have to create your own function
to do that.  Which should be fairly easy to do if you're working with a
static number of columns/data types/etc...
- Josh

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