From: | Steve Crawford <scrawford(at)pinpointresearch(dot)com> |
---|---|
To: | Mike Christensen <mike(at)kitchenpc(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Best data type to use for sales tax percent |
Date: | 2009-10-08 22:36:45 |
Message-ID: | 4ACE697D.6070508@pinpointresearch.com |
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Thread: | |
Lists: | pgsql-general |
Mike Christensen wrote:
> (Sorry for the super-easy question)
>
> I want to store sales tax (as a percent) in the DB, such as 9.5%.
> What's the best data type for this? I'm guessing numeric(2,3) should
> be fine, yes? I'm not too familiar with the numeric type (I was using
> "real" before), but as I understand the data will be stored using the
> necessary number of bits on the disk? Thanks!
>
> Mike
>
>
Peruse: http://www.postgresql.org/docs/8.4/interactive/datatype-numeric.html
Pay special attention to nuggets like:
The data types real and double precision are inexact...
and
If you require exact storage and calculations (such as for monetary
amounts), use the numeric type instead....
Cheers,
Steve
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