select * from table where userID in(1,2,3,etc)
> From: ash@xxxxxxxxxxxxxxxxxxxx
> Date: Tue, 13 Sep 2011 15:29:26 +0100
> To: dotancohen@xxxxxxxxx; php-general@xxxxxxxxxxxxx
> Subject: Re: Querying a database for 50 users' information: 50 queries or a WHERE array?
>
>
>
> Dotan Cohen <dotancohen@xxxxxxxxx> 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
> >
> >--
> >PHP General Mailing List (http://www.php.net/)
> >To unsubscribe, visit: http://www.php.net/unsub.php
>
> SELECT * FROM table WHERE userID IN (1,2,3,4,5,etc)
>
> Much smaller than what you proposed in #3, and easier to make if your user is list is already an array.
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
> --
> Sent from my Android phone with K-9 Mail. Please excuse my brevity.
>
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