How to properly use Alias in Codeigniter - codeigniter

Question

Here is my code:
$this->db->select('course_name AS Course Name,course_desc AS Course Description,display_public AS Display Status',FALSE);
$this->db->from('courses');
$this->db->where('tennant_id',$tennant_id);
$this->db->order_by('course_name','ASC');
$query = $this->db->get();
and I got an error:
A Database Error Occurred
Error Number: 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 'Name, course_desc AS Course Description, display_public AS Display Status FROM (' at line 1
and I got an error:
A Database Error Occurred
Error Number: 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 'Name, course_desc AS Course Description, display_public AS Display Status FROM (' at line 1
SELECT course_name AS Course Name,
course_desc AS Course Description,
display_public AS Display Status
FROM (`courses`) WHERE `tennant_id` = 'elicuarto#apploma.com'
ORDER BY `course_name` ASC
Filename: C:\wamp\www\coursebooking\system\database\DB_driver.php
Line Number: 330

Answer 1

Try
$this->db->select('course_name AS `Course Name`, course_desc AS `Course Description`, display_public AS `Display Status`', FALSE);
It's the space in your alias that is messing with you.
UPDATE
I'm not sure why you would want to, but I see nothing preventing you from writing
$this->db->select("course_name AS `{$variable}`", FALSE);
(showing just one field for simplicity)
UPDATE 2
Should be standard string conversion so I don't know why it doesn't work for you.. there's always split strings...
$this->db->select('course_name AS `' . $variable . '`', FALSE);