Hi Again... !!

> It is used to set up the navigator bar buttons for the grid on the web
page 
> (PHP) so it says  "<<  < Page 1 of 18   >  >>" with buttons on either
side 
> of it.

I'm a bit confused now...
You are building a "pager" to a webpage, right ??
But, if You select with LIMIT 100 then I assume that
You want to show 100 records per page...
If that's the case then You propably need to fetch
the count of ALL matching rows after all.


> This seems like the most economical way to approach it. Of course I would 
> then have to delay setting up the buttons until after the query is 
> executed. Right now it is done when the page first loads.  But that
should 
> be a trivial matter (I hope!<g>).

You can call mysql_num_rows() directly after query BEFORE you
loop through the recordset. (if it was that You ment with "delay"...)

---------------------------------------
=d0Mi= , DCS.net
[EMAIL PROTECTED]



---- Original Message -----
Date:  2-May-2002 17:22:44 +0200
From: mos <[EMAIL PROTECTED]>
To:  <[EMAIL PROTECTED]>
Subject: RE: Re:  How to Count(*) with LIMIT

> At 03:48 AM 5/2/2002, you wrote:
> 
> > > I have a Where clause like:
> > >          select count(*) from table where ....  LIMIT 100
> > >
> > > Unfortunately the Count(*) ignores the LIMIT clause entirely. Why?
> > >
> >
> >Because the query returns only ONE row and LIMIT limits rows, not values.
> >See ex. below:
> >
> >SELECT count(login) FROM accounts WHERE domain_id=1 LIMIT 3
> >+--------------+
> >| count(login) |
> >+--------------+
> >|            6 |
> >+--------------+
> >
> > > It seems to me that if a "select * from table where ... limit 100"
returns
> > > between 0 and 100 rows, you should be able to count it. Instead the
count
> > > returns 55,000 or some ridiculously large number that has no bearing on
the
> > > # of rows that will actually be returned (because of the LIMIT clause).
> > > Since this is running on a webserver, I don't want it to physically
count
> > > more than 100 rows. Some of the tables may be over 1 million rows and
> > > counting that many rows when only 100 rows are returned is overkill.
> >
> >Then why Use COUNT if You're not interested of number of records ??
> >Could You maybe specify what you actually want to do with the Count ??
> 
> It is used to set up the navigator bar buttons for the grid on the web
page 
> (PHP) so it says  "<<  < Page 1 of 18   >  >>" with buttons on either
side 
> of it.
> 
> 
> > > Is there a way around this counting problem? The only solution I've come
up
> > > with is to traverse all the rows returned by counting them in a loop.
This
> > > seems pretty lame and I'm hoping someone can come up with a better 
> > solution.
> >
> >If You want to know the number of rows in the recordset returned by the
query
> >then You should use "mysql_num_rows()". How You do this depends on the
> >language been used in Your application.
> 
> This seems like the most economical way to approach it. Of course I would 
> then have to delay setting up the buttons until after the query is 
> executed. Right now it is done when the page first loads.  But that
should 
> be a trivial matter (I hope!<g>).
> 
> Thanks for everyone's input.
> 
> Mike
> 
> sql, query
> 
> 
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