JF,

        You could try this, if I understand you correctly

        =======
        SELECT count(field_name), field_name
        FROM table_name
        GROUP BY field_name
        HAVING count(field_name) > 1
        =======

        or HAVING count(field_name) = 2 , to find records that are in
there twice and no more than that.





Regards

**************************************************************
*       K   e   i   t   h           B   u   r   k   e        *
**************************************************************
* Experience IT Ltd       * Phone : +353 1 xxx xxxx          *
* Unit G6                 * GSM   : +353 86 xxx xxxx         *
* Riverview Business Park * Email : [EMAIL PROTECTED]     *
* New Nangor Road         * WWW   : http://www.experience.ie *
* Dublin 12               *                                  *
* Ireland                 *                                  *
**************************************************************


-----Original Message-----
From: jf Leoni [mailto:[EMAIL PROTECTED]] 
Sent: 06 September 2002 11:28
To: [EMAIL PROTECTED]
Subject: how to find double


hello,

i have a table with 10 500 000 rows on a mysql database

how can i find doubles  ?? i know how to do it using php, but maybe
there 
is a way using only queries?

tks

JF leoni


---------------------------------------------------------------------
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

Reply via email to