Re: grabbing from multiple tables
| From: | Peter Lind | Date: | Sat, 01 May 2010 08:22:04 +0000 |
| Subject: | Re: grabbing from multiple tables | ||
| References: | 1 2 | Groups: | php.db |
| Request: | Send a blank email to php-db+get-47110@lists.php.net to get a copy of this message | ||
On 30 April 2010 20:49, Karl DeSaulniers <karl@designdrumm.com> wrote:
> No, please confuse me. I need to know this stuff.
>
> @Peter thanks for that introduction to foreign keys. Since my productoptions
> table is based off of items in products, optionGroups and options, would I
> use foreign keys for this?
If I read you correct, your productoptions table is basically a lookup
table and as such all your fields should be foreign keys. Because,
each field is a reference to another table - and it's vital to data
consistency that they cannot point to a row in a table that doesn't
exist.
--
<hype>
WWW: http://plphp.dk / http://plind.dk
LinkedIn: http://www.linkedin.com/in/plind
Flickr: http://www.flickr.com/photos/fake51
BeWelcome: Fake51
Couchsurfing: Fake51
</hype>