Re: foreign key

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On 9 August 2011 20:31, Chris Stinemetz <chrisstinemetz@xxxxxxxxx> wrote:
> Okay. I am pretty new to mysql so this may seem like a ridiculous
> question to some people.
>
> I am trying to use a LEFT JOIN query, but the results I am finding
> unusual. For every record occurrence there is for the query, the
> results are duplicated by that amount.
>
> So if there are 3 records from the query results, then the output is 3
> times what I expect.. if that makes sense.
>
> From what I have researched so far. I believe I may need to add a
> foreign key to build the relations between the two tables.
>
> Based on the query can any tell me the correct way of adding the
> foreign key if ,in fact, that is what I need?
>
> I can provide table structures and information if necessary.
>
> The query is:
>
> $posts_sql = "SELECT
> store_subject,
> store_comments,
> store_date,
> store_tptest,
> store_by,
> users.user_id,
> users.user_name,
> users.first_name,
> users.last_name
> FROM
> stores
> LEFT JOIN
> users
> ON
> stores.store_by = users.user_id
> WHERE
> stores.store_subject = '" . mysql_real_escape_string($_GET['id'])."'
> ORDER BY
> stores.store_date DESC ";
>
> The query dump is:
>
> SELECT store_subject, store_comments, store_date, store_tptest,
> store_by, users.user_id, users.user_name, users.first_name,
> users.last_name FROM stores LEFT JOIN users ON stores.store_by =
> users.user_id WHERE stores.store_subject = 'Noland Park Plaza 3509 S.
> Noland Rd' ORDER BY stores.store_date DESC
>

Is users.user_id unique?

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