AND NOT EXISTS(SELECT `external-id` FROM `post-user` WHERE `external-id` = `item-uri`.`id`)
AND NOT EXISTS(SELECT `uri-id` FROM `mail` WHERE `uri-id` = `item-uri`.`id`)
AND NOT EXISTS(SELECT `uri-id` FROM `event` WHERE `uri-id` = `item-uri`.`id`)
AND NOT EXISTS(SELECT `external-id` FROM `post-user` WHERE `external-id` = `item-uri`.`id`)
AND NOT EXISTS(SELECT `uri-id` FROM `mail` WHERE `uri-id` = `item-uri`.`id`)
AND NOT EXISTS(SELECT `uri-id` FROM `event` WHERE `uri-id` = `item-uri`.`id`)