Question

好吧，我在这里有两张表，gforum_Post和gforum_PostView

我试图从表gforum_Post获取具有相同post_id的信息。

"SELECT post_subject, post_username FROM `gforum_Post` WHERE post_id = 341"

我已经让它显示我想要的东西，但它的硬编码，列中的数据会发生变化。这是我到目前为止所做的事情

SELECT post_id_fk, post_thread_views FROM `gforum_PostView` ORDER BY `gforum_PostView`.`post_thread_views` DESC

SELECT post_subject, post_username FROM `gforum_Post` WHERE post_id = 341

341是硬编码的值

Answer 1

您可以使用join来加入表格：

SELECT post_id_fk, post_thread_views, post_subject, post_username FROM `gforum_PostView` 
join `gforum_Post` on post_id =post_id_fk
ORDER BY `gforum_PostView`.`post_thread_views` DESC

Answer 2

我认为您正在寻找的是JOIN查询：

SELECT GPV.post_id_fk, GPV.post_thread_views, GP.post_subject, GP.post_username 
FROM gforum_Post GP, gforum_PostView GPV 
WHERE GP.post_id = 341
ORDER BY GPV.post_thread_views DESC

MySQL - 从2个表中获取数据

2 个答案: