Re: [SQL] Please help: How to determine largest of two numbers in a query?

Greg -

This may not be the slickest way to do it, but it works...

SELECT yyyymmdd, key, value1 AS value
FROM greg
WHERE value1 > value2
UNION SELECT yyyymmdd, key, value2 AS value
FROM greg
WHERE value2 > value1;

I hope this helps. :-)

Blessings,
Adam

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Adam Maddock http://Adam.Maddock.com
Detroit, MI adam(at)maddock(dot)com
"BE IMITATORS of God, therefore, as dearly loved children..."
(Ephesians 5:1)
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On Wed, 2 Dec 1998, Greg Youngblood wrote:

> I have a table with the following structure:
> yyyymmdd int4
> key char(16)
> value1 int4
> value2 int4
>
> with the following sample data:
> yyyymmdd key value1 value2
> 19981201 hello 32 16
> 19981201 bye 29 64
> 19981202 hello 16 20
> 19981202 bye 23 13
>
> What I need is to select the greatest between value1 and value2, so the
> answer would be:
> yyyymmdd key value
> 19981201 hello 32
> 19981201 bye 64
> 19981202 hello 20
> 19981202 bye 23
>
> I can do this via ODBC using access by creating a column which is defined as
> IF(value1>value2,value1,value2) but that doesn't work in psql.
>
> How can I make this work in psql?
>
> Thanks
> Greg
>