如何糾正“ SQLSTATE [42000]：語法錯誤或訪問沖突：1064”錯誤

Question

伙計們，我實際上是在嘗試創建類似Facebook的供稿的供稿，但我收到了這個錯誤，我無法弄清楚我在哪里出錯。 這是代碼：

$sql3="select u.update_id, u.update_body,u.account_name,u.os_id,u.author,u.time,u.title,"
            . "c.comment_body, c.os_id,c.author,c.time"
            . "from updates as u, comment_update as c "
            . "where c.os_id=u.update_id and u.account_name = ':session' and u.type in ('a','c') and u.account_name=':friend' and u.type =('a'|'c') order by u.time asc,c.time desc";
     $stmth=$conn->prepare($sql3);
   $stmth->execute(array(":session"=>$_SESSION['uname'],":friend"=>$friend));
    $status_reply= $stmth->fetchAll(PDO::FETCH_ASSOC);

這是錯誤代碼：-

致命錯誤：消息為“ SQLSTATE [42000]”的未捕獲的異常“ PDOException”：語法錯誤或訪問沖突：1064 SQL語法有錯誤； 檢查與您的MySQL服務器版本相對應的手冊以獲取正確的語法，以在/ opt / lampp中的'as u，comment_update as c附近使用，其中c.os_id = u.update_id和u.account_name ='：sessi'在第1行' /htdocs/project-chg/status&comments.php:28堆棧跟蹤：＃0 /opt/lampp/htdocs/project-chg/status&comments.php(28）：PDOStatement-> execute（Array）＃1 / opt / lampp / htdocs /project-chg/example1.php(30）：include（'/ opt / lampp / htdo ...'）＃2 {main}放在第28行的/opt/lampp/htdocs/project-chg/status&comments.php中

任何幫助，將不勝感激。

Answer 1

您的代碼：

$sql3="select u.update_id, u.update_body,u.account_name,u.os_id,u.author,u.time,u.title,"
            . "c.comment_body, c.os_id,c.author,c.time"
            . "from updates as u, comment_update as c "
            . "where c.os_id=u.update_id and u.account_name = ':session' and u.type in ('a','c') and u.account_name=':friend' and u.type =('a'|'c') order by u.time asc,c.time desc";

1. 在之前添加空間

2. 將('a'|'c')更改為('a','c')

3. 考慮使用逗號語法的JOIN語法instad

4. 可能您需要刪除:friend和:session周圍的'

5. 整個WHERE clause conditions對我來說很奇怪u.account_name = :session and u.account_name=:friend在同一列上u.account_name = :session and u.account_name=:friend ？？？ + u.type條件加倍

結果：

$sql3="select u.update_id, u.update_body,u.account_name,u.os_id,u.author,u.time,u.title,"
            . "c.comment_body, c.os_id,c.author,c.time"
            . " from updates as u JOIN comment_update as c ON c.os_id=u.update_id "
            . "where u.account_name = :session and u.type in ('a','c') and u.account_name=:friend and u.type =('a','c') order by u.time asc,c.time desc";