MYSQL，ORDER BY LIKE

Question

我有2個表格主題和帖子，我想搜索我的帖子，並按大多數匹配的線程順序。

現在，我有這樣的：

SELECT Threads.* 
FROM Posts 
INNER JOIN Threads ON Posts.ThreadID=Threads.ThreadID 
WHERE Posts.Content LIKE '%" . $search . "%' 
    OR Posts.User LIKE '%" . $search ."%' 

Answer 1

你可以添加一個連接來計算每個線程的職位數目。由於您沒有從帖子中選擇任何欄目，這是您需要的唯一連接。

select t.* 
from Threads t 
join (
     select ThreadID 
     ,  count(*) as PostCount 
     from Posts 
     where p.Content LIKE '%" . $search . "%' 
       or p.User LIKE '%" . $search ."%' 
     group by 
       ThreadID 
     ) PostCount 
on  PostCount.ThreadID = t.ThreadID 
order by 
     PostCount.PostCount desc