Re: Comparing multiple Mysql tables to find duplicates

Cool, thanks John, I'll give it a shot. Sorry for the last email, I sent it before you sent this one :) -- Chris Bruce chris@idextrus.com Idextrus E-Business Architects http://www.idextrus.com 3282 Wilmar Cres. Mississauga, ON L5L4B2 CA 905.828.9189 On Jan 30, 2004, at 12:54 PM, John W. Holmes wrote:

From: "Chris Bruce" <chris@idextrus.com>

Mysql 3.23.54. My first thought was to load the output from the tables into an array and they use a foreach and in_array to create a list of dups, but I wanted to see if there was an easier way.

Ah, in that case, my other query won't work. :) This should: <?php $query = "SELECT list1.email FROM master_list, list1 WHERE master_list.email = list1.email"; $result = mysql_query($query) or die(mysql_error()); while($r = mysql_fetch_assoc($result)) { $email_list .= "'{$row['email']}',"; } $email_list = substr($email_list,0,-1); //remove last comma $query = "DELETE FROM list1 WHERE email IN ($email_list)"; $result = mysql_query($query) or die(mysql_error()); ?> Repeat for other tables. ---John Holmes... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php