From: Aaron Bono <postgresql@aranya.com>
To: Phillip Smith <phillips@weatherbeeta.com.au>
Cc: pgsql-sql@postgresql.org
Subject: Re: Select Maths
Date: Fri, 7 Jul 2006 03:36:53 -0500
Message-ID: <bf05e51c0607070136he5519b9x96e97a73a6483a2a@mail.gmail.com> (raw)
In-Reply-To: <012b01c6a192$1b827730$9b0014ac@ITPhil>
References: <012b01c6a192$1b827730$9b0014ac@ITPhil>
On 7/7/06, Phillip Smith <phillips@weatherbeeta.com.au> wrote:
>
> Same SELECT query as before, different area of it… I have a function that
> calculates the recommended purchase order quantity for a stock item based
> off various other values and functions:
>
> pqty(stock.code) AS "pqty"
>
>
>
> This needs to be rounded up / down to the nearest multiple of the *purchase
> unit* quantity for that product – It's Friday afternoon and my head has
> refused to help me work out the maths all afternoon!
>
>
>
> Example:
>
> Pqty = 60
>
> Purchase Unit = 25
>
> Pqty needs to be rounded down to 50.
>
>
>
> I guess I'm also asking if I should do this in the Pqty function or in the
> SELECT query to optimize the result?
>
select 25 * round(cast(60 as double precision) / 25)
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To: pgsql-sql@postgresql.org
Cc: postgresql@aranya.com, phillips@weatherbeeta.com.au
Subject: Re: Select Maths
In-Reply-To: <bf05e51c0607070136he5519b9x96e97a73a6483a2a@mail.gmail.com>
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