Re: find a value in entire table...
| From: | Tristan dot Pretty at risk dot sungard dot com | Date: | Wed, 06 Apr 2005 13:54:32 +0000 |
| Subject: | Re: find a value in entire table... | ||
| References: | 1 | Groups: | php.db |
| Request: | Send a blank email to php-db+get-39134@lists.php.net to get a copy of this message | ||
that's a fine idea!
I'll hve a play...
Cheers...
Martin Norland <martin.norland@stjude.org>
06/04/2005 14:51
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Re: [PHP-DB] find a value in entire table...
Tristan.Pretty@risk.sungard.com wrote:
> I need to search an entire table for a value, and then report back what
> field it was found in... how on earth do I do that?
> I've a list of departments, as field names.
> whenever a user interacts with that Dpet, I wanna add thier id No to the
> appropriate field.
[snip]
> So I wanna input an user ID no, and then get told what Dpets have been
> accessed...
>
> I need to learn this, as I know it's simple, but I've never had to do it
> before!
You'll be better off storing a single row for each user/department
interaction. In fact, break them straight out into id's and just have
it as a linking table
user_department_interactions
| user_id | department_id |
then have a table for the departments information
departments
| department_id | department_name | more fields... |
a simple join in your query will tell you the department name
select distinct department_name from user_department_interactions where
user_id=3 AND user_department_interactions.department_id =
departments.department_id;
the above will return a list of department names that user_id 3
interacted with. Whenever they interact with a department you just
insert a single row into the user_department_interactions table, if you
only ever want to store whether they interacted at all, you can set
constraints and catch the error on insert, or search before inserting.
cheers,
--
- Martin Norland, Sys Admin / Database / Web Developer, International
Outreach x3257
The opinion(s) contained within this email do not necessarily represent
those of St. Jude Children's Research Hospital.
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