-5
SELECT `users`.`first_name`, `user_profile`.`user_id`,
`user_profile`.`image`, `messages`.* FROM `messages` LEFT JOIN `user_profile` ON
`user_profile`.`user_id` = `messages`.`from_id` LEFT JOIN `users`ON `users`.`id`
= `messages`.`from_id` WHERE (messages.delete_from != '9' AND messages.delete_to
!='9’) AND (`messages`.`members` = '4,9' OR `messages`.`members` = '9,4')
ORDER BY `date` ASC
阅读本https://www.codeigniter.com/userguide3/database/query_builder.html#selecting-data –
停止懒惰,阅读活动记录手册并与之相关 – Ghost
$ this-> db-> from($ this-> table); $ this-> db-> select('users.first_name,user_profile.user_id,user_profile.image,messages。*'); $ this-> db-> join('user_profile','user_profile.user_id = messages.from_id','left'); $ this-> db-> join('users','users.id = messages.from_id','left'); $ this-> db-> where($ id1); $ this-> db-> where($ id2); $ this-> db-> where('messages.members',$ con1); $ this-> db-> or_where('messages.members',$ con2);我用这个,但它不工作 – Anju