PDO查詢語法錯誤

Question

你能告訴我這個查詢有什麼問題嗎？我一直在尋找了將近一個小時，但我看不出任何語法錯誤..

$query = $database->connection->prepare(
     "SELECT 
     n.from_id AS friend_id, 
     n.type AS type, 
     n.created_date AS time, 
     u.user_profile_picture AS profile_picture, 
     u.user_firstname AS friend_firstname, 
     u.user_lastname AS friend_lastname, 
     FROM notifications n INNER JOIN users u ON u.user_id = n.from_id 
     WHERE n.to_id = :user_id AND n.checked = 1"); 

    $query->bindValue(':user_id', $user_id, PDO::PARAM_STR); 
    $query->execute(); 

這是錯誤：

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 'FROM notifications n INNER JOIN users u ON u.user_id = n.from_id WHERE n.to_id =' at line 8' in

Answer 1

取出,前FROM

SELECT 
     n.from_id AS friend_id, 
     n.type AS type, 
     n.created_date AS time, 
     u.user_profile_picture AS profile_picture, 
     u.user_firstname AS friend_firstname, 
     u.user_lastname AS friend_lastname 
     FROM notifications n INNER JOIN users u ON u.user_id = n.from_id 
     WHERE n.to_id = :user_id AND n.checked = 1 

Answer 2

你必須在行尾刪除逗號：

u.user_lastname AS friend_lastname,