Re: Combining 2 queries into 1?
| From: | Kim Steinhaug | Date: | Sun, 30 May 2004 21:27:25 +0000 |
| Subject: | Re: Combining 2 queries into 1? | ||
| References: | 1 2 | Groups: | php.db |
| Request: | Send a blank email to php-db+get-34588@lists.php.net to get a copy of this message | ||
Thanks for your response, however you missunderstood my
question. I just posted the sollution in this thread over.
I was looking for a query that gave me the total amount on users
which had a userID and the total without a userID. Selecting (*)
would give me both the anonymous and logged users.
--
--
Kim Steinhaug
----------------------------------------------------------------------
There are 10 types of people when it comes to binary numbers:
those who understand them, and those who don't.
----------------------------------------------------------------------
www.steinhaug.com - www.easywebshop.no - www.webkitpro.com
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"Jonathan Hadddad" <jon@oldirtyhaddad.com> wrote in message
news:9BADBFEC-B27D-11D8-958A-000D9350D348@oldirtyhaddad.com...
> How about
>
> select count(*) from online
>
> Jon
>
> On May 30, 2004, at 1:23 PM, Kim Steinhaug wrote:
>
> > I have theese two queries :
> >
> > select count(*) as online from online where uid='';
> > select count(*) as online from online where uid!='';
> >
> > Each online user has a uid (UserID), so if their logged
> > inn this field will represent their unique uid. If not logged
> > in its set to nothing.
> >
> > To detect how many online users the first query tells me
> > all the "anonymous" users and the second gives "members".
> >
> > Since theese two queries are fired on every page hit, I would
> > assume that if I could join theese queries into one I would
> > atleast save the mysql for a 50% of the queries.
> >
> > Ive veeb experimenting on the count(expression) without
> > any luck, probably since the server is running v4.0.17-standard
> >
> > So I wonder - is there any way I could join the above queries
> > into one single query? Ofcourse I could easily add another
> > field for the database, something like temp which is NULL for
> > anonymous and 1 for user if this makes is easier to group the
> > the query in some wmart way I havnt figured out at the moment.
> >
> > --
> > --
> > Kim Steinhaug
> > ----------------------------------------------------------------------
> > There are 10 types of people when it comes to binary numbers:
> > those who understand them, and those who don't.
> > ----------------------------------------------------------------------
> > www.steinhaug.com - www.easywebshop.no - www.webkitpro.com
> > ----------------------------------------------------------------------
> >
> > --
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> >
> >
> >