mysql - mySQL 内连接查询 - 我如何组合这两个查询？

Question

这是我当前的查询：

SELECT DISTINCT t.* FROM filter AS f
INNER JOIN filter_thread AS ft 
ON ft.filter_id = f.filter_id
INNER JOIN thread AS t 
ON ft.thread_id = t.thread_id
WHERE f.tag LIKE '%test%'
ORDER BY t.replystamp DESC

它返回一堆数据，包括“owner_id”列。

'user_table' 包含一个匹配的 id，标记为 'id'

我以前使用此查询来获取数据：

SELECT username FROM users WHERE id='$user_id'"

我需要这些出现在同一个查询中！但是添加一个额外的 INNER JOIN 是行不通的。

Answer 1

也许是这样：

SELECT DISTINCT t.*,u.username
FROM filter AS f
INNER JOIN filter_thread AS ft 
ON ft.filter_id = f.filter_id
INNER JOIN thread AS t 
ON ft.thread_id = t.thread_id
INNER JOIN users AS u
ON u.id = t.owner_id
WHERE f.tag LIKE '%test%'
ORDER BY t.replystamp DESC

只是一个猜测。

Answer 2

尝试以下操作：

SELECT DISTINCT t.*, u.username FROM filter AS f
   INNER JOIN filter_thread AS ft 
      ON ft.filter_id = f.filter_id
   INNER JOIN thread AS t 
      ON ft.thread_id = t.thread_id
   INNER JOIN users AS u 
      ON ft.owner_id = u.id
   WHERE f.tag LIKE '%test%'
   ORDER BY t.replystamp DESC