如何糾正「SQLSTATE [42000]：語法錯誤或訪問衝突：1064」錯誤

Question

夥計們我試圖在這裏實際創建一個像Facebook的飼料這樣的飼料，但我得到這個錯誤，我不知道我哪裏會出錯。 這裏是代碼：

$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); 

這裏是錯誤代碼： -

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'as u, comment_update as c where c.os_id=u.update_id and u.account_name = ':sessi' at line 1' in /opt/lampp/htdocs/project-chg/status&comments.php:28 Stack trace: #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} thrown in /opt/lampp/htdocs/project-chg/status&comments.php on line 28

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. 添加從

2. 更改之前的空間('a'|'c')到('a','c')

3. 考慮使用逗號語法JOIN語法instad

4. 也許你需要刪除'周圍:friend和:session

5. 全WHERE clause conditions是我u.account_name = :session and u.account_name=:friend同一列很奇怪??? +一倍u.type條件

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";