`user`.`nickname`, `user`.`hidewall`
FROM `item` LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
LEFT JOIN `user` ON `user`.`uid` = `item`.`uid`
`user`.`nickname`, `user`.`hidewall`
FROM `item` LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
LEFT JOIN `user` ON `user`.`uid` = `item`.`uid`