我一直在寻找一段时间,但仍未找到最佳解决方案。我有三个表:帖子,成员资格和评论。我想要一个评论和回复系统。
这些是我的表格:
主要帖子:
post_id | image_url | image_thumb_url | title | text | date | sender_id
会员资格:
user_id | username | pw | email |
对帖子的评论(回复):
com_id | comment | post_id_fk | user_id_fk | ip | date
我目前有一个查询,用于检索包含会员资料数据的帖子:
SELECT * FROM `posts`
LEFT JOIN `membership` ON `posts`.`sender_id` = `membership`.`user_id`
UNION SELECT * FROM `posts`
RIGHT JOIN `membership` ON `posts`.`sender_id` = `membership`.`user_id`
ORDER BY `post_id` DESC LIMIT $limit $start;
我现在想要添加对每个帖子的回复,其中包含会员资料数据。有没有人有建议或者更好的解决方案?
答案 0 :(得分:0)
SELECT * FROM posts AS P
LEFT JOIN comments AS C
ON P.post_id = C.post_id_fk
LEFT JOIN membership AS POST_MEMBER
ON POST_MEMBER.user_id = P.sender_id
LEFT JOIN membership AS REPLY_MEMBER
ON REPLY_MEMBER.user_id = C.user_id_fk