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 > > > --------------------------------------------------------------------- > Before posting, please check: > http://www.mysql.com/manual.php (the manual) > http://lists.mysql.com/ (the list archive) > > To request this thread, e-mail <[EMAIL PROTECTED]> > To unsubscribe, e-mail <[EMAIL PROTECTED]> > Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php > > --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
