RE: [PHP-DB] DELETE in mysql?
| From: | Adv. Systems Design | Date: | Fri, 01 Feb 2002 22:44:00 +0000 |
| Subject: | RE: [PHP-DB] DELETE in mysql? | ||
| References: | 1 | Groups: | php.db |
| Request: | Send a blank email to php-db+get-16430@lists.php.net to get a copy of this message | ||
Maybe my example attempt is misguided but the idea is
to look up the prod_id from temp to know which records
to delete in the prod, prod_price, prod_cat tables,
all having the prod_id field as a link...just like you
can do in a SELECT statement:
select p.product_id, p.product_price
from product_price as p, temp as t
where t.product_id = p.product_id
Let me know if what I am asking is unclear.
--- Rick Emery <remery@excel.com> wrote:
> You cannot refer to other tables. Which row in temp
> would MYSQL know to
> refer to test the WHERE clause? That is, if temp
> has multiple rows, which
> row in temp would MYSQL check against to determine
> prod_id?
>
>
> -----Original Message-----
> From: Adv. Systems Design
> [mailto:asd_2000@yahoo.com]
> Sent: Friday, February 01, 2002 2:43 PM
> To: PHP List
> Subject: [PHP-DB] DELETE in mysql?
>
>
> sorry if this is painfully obvious but I can't seem
> to
> figure it out...It seems to me (unless I am reading
> it
> waay wrong) that the mysql DELETE command does NOT
> allow you to refer to columns from other tables!
>
> I have identified certain records to be deleted from
> 3
> tables and created a temp table to hold the
> item_id's
> to look up and delete...BUT HOW?! Ideally it would
> be:
>
>
> DELETE FROM prod, prod_price, prod_cat
> WHERE temp.prod_id = prod.prod_id
> AND temp.prod_id = prod_price.prod_id
> AND temp.prod_id = prod_cat.prod_id
>
> TIA
>
> Luis
>
> =====
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> Make it idiot-proof and someone will make a better
> idiot.
>
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Make it idiot-proof and someone will make a better idiot.
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