是有什麼問題MySQL的句法

Question

是有什麼不對的MySQL語法，我相信語法是，雖然對的，我不斷收到的錯誤是，當我跑我的網站

$query = "SELECT DISTINCT paycheck.jobId 
     FROM paycheck,users 
     WHERE users.email = " . $_SESSION['email'] . 
     "AND userId = empId"; 

Answer 1

您忘記單一語法錯誤在這裏引用

$query = "SELECT DISTINCT paycheck.jobId 
FROM paycheck,users 
WHERE users.email = '" . $_SESSION['email'] ."' AND userId = empId"; 

Answer 2

試試這個：

$query = "SELECT DISTINCT `paycheck`.`jobId` 
     FROM `paycheck`,`users` 
     WHERE `users`.`email` = '" . $_SESSION['email'] ."' AND `userId` = 'empId' "; 

你也可能要考慮你的逃逸查詢以防止sql注入