Re: Querying a database for 50 users' information: 50 queries or a WHERE array?
| From: | muad shibani | Date: | Tue, 13 Sep 2011 14:32:52 +0000 |
| Subject: | Re: Querying a database for 50 users' information: 50 queries or a WHERE array? | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-314792@lists.php.net to get a copy of this message | ||
Yes there is but all the IDs in one string like this
$ids = $id1.', '.$id2.', ' ;
note : remove the last comma from the string
the make the query like this:
mysql_query("SELECT * FROM table WHERE
userID= in($ids ) }
On Tue, Sep 13, 2011 at 7:24 AM, Dotan Cohen <dotancohen@gmail.com> wrote:
> I have a MySQL database table with about 10,000 rows. If I want to
> query for 50 specific users (so no LIMIT ORDER BY) then I seem to have
> these choices:
>
> 1) SELECT * FROM table
> This will pull in all 10,000 rows, not nice!
>
> 2) foreach ($user as $u) { mysql_query("SELECT * FROM table WHERE
> userID=".$u); }
> This will lead to 50 queries, again not nice! (maybe worse)
>
> 3) foreach ($user as $u) { $whereClause+=" OR userID=".$u; }
> This makes a huge SQL query. However, this is the method that I'm using
> now.
>
> Is there some sort of array that can be passed in the WHERE clause,
> containing all the userID's that I am interested in?
>
> Thanks!
>
> --
> Dotan Cohen
>
> http://gibberish.co.il
> http://what-is-what.com
>
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