SQL語法;檢查對應於您MariaDB的服務器版本

Question

我得到下面的SQL錯誤的手冊：

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near `classxii`.`email`='rajdeep@gmail.com', `classx`.`email`='rajdeep@gmail.com' at line 5

我的PHP代碼如下所示：

$sql = "UPDATE `graduation`, `classxii`, `classx` SET `university`='$university', `college`='$college', `course`='$course', `branch`='$branch', `year`='$year', 
`school1`='$school1', `board1`='$board1', `percentage1`='$percentage1', `year1`='$year1', 
`school2`='$school2', `board2`='$board2', `percentage2`='$percentage2', `year2`='$year2' 
WHERE `graduation`.`email`='$email', `classxii`.`email`='$email', `classx`.`email`='$email'"; 

$res = mysql_query($sql) or die(mysql_error()); 

可能是什麼問題嗎？

Answer 1

您需要更改逗號以及在你的部分語句：或者

WHERE `graduation`.`email`='$email' AND `classxii`.`email`='$email' AND `classx`.`email`='$email'"; 

如果搜索只是其中之一使用OR：

WHERE `graduation`.`email`='$email' OR `classxii`.`email`='$email' OR `classx`.`email`='$email'";