Hello! I have to tables that are similar in important respects but different enough that I want them independent of each other ([b]flag_requests[/b] and [b]tour_requests[/b]). The tables [b]flag_notes[/b] and [b]tour_notes[/b] keep track of user submitted notes regarding the rows in [b]flag_requests[/b] and [b]tour_requests[/b], respectively. What I want is to select the rows in [b]flag_requests[/b] and [b]tour_requests[/b] that have zero rows in their respective [b]flag_notes[/b] and [b]tour_notes[/b] tables, and order the results by a column [b]added[/b] (datetime) which exists in both [b]flag_requests[/b] and [b]tour_requests[/b]. In other words, the unaddressed requests, as per their having no notes about them. My pathetic attempt: [code]SELECT * FROM flag_requests, tour_requests WHERE COUNT( SELECT * FROM flag_notes, tour_notes WHERE flag_notes_request_id=flag_requests.id OR tour_notes.request_id=tour_requests.id )=0 ORDER BY added[/code] the tables: [code]CREATE TABLE `flag_notes` ( `id` int(11) NOT NULL auto_increment, `office_id` int(11) default NULL, `user_id` int(11) default NULL, `party_id` int(11) default NULL, `request_id` int(11) default NULL, `added` datetime default NULL, `body` text, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2 ; CREATE TABLE `flag_requests` ( `id` int(11) NOT NULL auto_increment, `office_id` int(11) default NULL, `party_id` int(11) default NULL, `date_to_be_flown` date default NULL, `date_needed_by` date default NULL, `flown_for` varchar(150) default NULL, `occassion` varchar(250) default NULL, `special_instructions` text, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2 ; CREATE TABLE `tour_notes` ( `id` int(11) NOT NULL auto_increment, `office_id` int(11) default NULL, `user_id` int(11) default NULL, `party_id` int(11) default NULL, `request_id` int(11) default NULL, `added` datetime default NULL, `body` text, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=52 ; CREATE TABLE `tour_requests` ( `id` int(11) NOT NULL auto_increment, `party_id` int(11) NOT NULL, `type` int(11) default NULL, `confirmed` datetime default NULL, `cancelled` varchar(200) default NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=26 ;[/code]