[ERROR SQL] I need help fixing this error

Question

when i try to run this:
$queryMenu = "SELECT `user_menu`.`id`, `menu`
FROM `user_menu` JOIN `user_access_menu`
ON `user_menu`.`id` = `user_access_menu`.`menu_id`
WHERE `user_access_menu`.`role_id` = $role_id
ORDER BY `user_access_menu`.`menu_id` ASC
";
I got the Error Number: 1064. 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 'ORDER BY `user_access_menu`.`menu_id` ASC' at line 5.
Thank you.
#I've already tried to add ';' after 'ASC' but still got the same error

Answer 1

I don;t have knowledge about Maria DB.
But I would try something like :
If role_id is number
---
$queryMenu = "SELECT user_menu.id
, menu
FROM user_menu
JOIN user_access_menu ON user_menu.id = user_access_menu.menu_id
WHERE user_access_menu.role_id = ".$role_id."
ORDER BY product_manufacturer DESC";
or
If role_id is string
---
$queryMenu = "SELECT user_menu.id
, menu
FROM user_menu
JOIN user_access_menu ON user_menu.id = user_access_menu.menu_id
WHERE user_access_menu.role_id = '".$role_id."'
ORDER BY product_manufacturer DESC";
--=======================
Print also the variable to check what is the string which is constructed to check if it is valid

Answer 2

$role_id = $this->session->userdata('role_id');