Trees can be complex in SQL; these articles will give some different ideas to handle it: http://hashmysql.org/index.php?title=Trees_and_hierarchical_data_in_SQL http://dev.mysql.com/tech-resources/articles/hierarchical-data.htm
Regards, Gavin Towey -----Original Message----- From: David Arroyo Menendez [mailto:david.arr...@bbvaglobalnet.com] Sent: Tuesday, February 16, 2010 8:27 AM To: mysql@lists.mysql.com Subject: count children nodes Hello, I've the next table structure: CREATE TABLE tx_cc20_mensajes ( uid int(11) NOT NULL auto_increment, pid int(11) DEFAULT '0' NOT NULL, tstamp int(11) DEFAULT '0' NOT NULL, crdate int(11) DEFAULT '0' NOT NULL, cruser_id int(11) DEFAULT '0' NOT NULL, deleted tinyint(4) DEFAULT '0' NOT NULL, hidden tinyint(4) DEFAULT '0' NOT NULL, remitente int(11) DEFAULT '0' NOT NULL, destinatario int(11) DEFAULT '0' NOT NULL, padre int(11) DEFAULT '0' NOT NULL, mensaje text, leido tinyint(3) DEFAULT '0' NOT NULL, PRIMARY KEY (uid), KEY parent (pid) ); Where padre is the id of the parent message. I need count the messages don't read in a thread. How can I do it? With $query="select count(*) as num from tx_cc20_mensajes msj where hidden=0 and deleted=0 and leido=0 and destinatario=".$uid." and remitente<>".$uid." and (padre=".$est_row['uid']." or uid=".$est_row['uid'].")"; I am counting only the first level, but I need count the rest of children messages. What is the query? Thanks! This message contains confidential information and is intended only for the individual named. If you are not the named addressee, you are notified that reviewing, disseminating, disclosing, copying or distributing this e-mail is strictly prohibited. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any loss or damage caused by viruses or errors or omissions in the contents of this message, which arise as a result of e-mail transmission. [FriendFinder Networks, Inc., 220 Humbolt court, Sunnyvale, CA 94089, USA, FriendFinder.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
