[AccessD] Confused by One to Many versus One to One

I'd guess that was the reason the aforementioned government agency DB schema
was set up the way it was.

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Tina Norris
Fields
Sent: Saturday, January 03, 2015 3:17 PM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] Confused by One to Many versus One to One

In fact, the only way I've ever seen a 1-to-1 relationship used was to make
a table of confidential employee data that shouldn't appear in the general
employee info table.  I read an example once, suggested for a library
database, but I honestly didn't understand it at all.
TNF

Tina Norris Fields
tinanfields-at-torchlake-dot-com
231-322-2787

On 11/30/2014 2:57 PM, Jim Dettman wrote:
> Bill,
>
>   It's pretty rare to have a 1 to 1.  Pretty much everything will be a 
> 1 to M or a M to M.
>
> Jim.
>
> -----Original Message-----
> From: accessd-bounces at databaseadvisors.com
> [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Bill Benson
> Sent: Friday, November 28, 2014 07:52 PM
> To: 'Access Developers discussion and problem solving'
> Subject: [AccessD] Confused by One to Many versus One to One
>
> I almost never make relationships one to one, and yet my databases 
> always seem to "work." By work, I mean that I never seem to run into 
> situations where I cannot accomplish what I want to, in terms of 
> record insertion, queries, etc. So I now have a situation where maybe that
is not a good idea.
>
>   
>
> I have Order and Product tables, one order can contain many products. 
> So I required an OrderProducts table to distribute the same OrderID 
> across numerous ProductIDs.
>
>   
>
> My question is, should the relationship between the Order and 
> OrderProduct, on the OrderID and FKOrderID, be 1-to-1, or 1-to-many?
>
>   
>
> Likewise, the same question for the OrderProduct and the Product, on 
> the ProductID and the FKProductID?
>
>   
>
>   
>

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