爲什麼我的JOIN mysql不工作？

Question

所以我需要來自2個表格的信息，但我的JOIN Mysqli不會工作，任何人都可以告訴我最新的問題？ ：/ 我是新來的INNER JOIN的所以它可能是我理解錯了東西X_X

if($stream = $mysqli->prepare("SELECT $title.message_id, $title.message, $title.likes, $title.dislikes, $title.poster, $title.date, $title.closed user.rank, user.posts, user.reputation FROM $title INNER JOIN User ON $title.poster = user.username ORDER BY message_id ASC")){ 
            $stream->execute(); 
             $stream->bind_result($message_id, $message, $likes, $dislikes, $poster, $date, $closed, $rank, $posts, $rep, $usnm); 

             while($stream->fetch()){ 

Answer 1

你肯定$title定義？你確定user有大寫嗎？

SELECT * 
FROM $title 
INNER JOIN user 
ON $title.poster = user.username 
ORDER BY message_id ASC; 

Answer 2

看起來像你缺少列之間用逗號：$title.closed<needs comma here> user.rank

Answer 3

首先，你必須在這裏缺少昏迷：

$title.closed user.rank 

而且，在您的查詢中，表「用戶」應該用作內部聯接中聲明的大寫字母的「用戶」。內連接是錯誤的。

你應該總是從內加入由連接表的條件：

WRONG

FROM $title INNER JOIN User ON $title.poster = user.username 

GOOD

FROM $title INNER JOIN User ON User.username = $title.poster