MySQL - Issue with SELECT & GROUP BY [SOLVED]

I'm not entirely sure this will work, but try this

PHP Code:

$this->db->select("pages.*,GROUP_CONCAT('tags_name')"); 


Thanks for your fast reply ! 

So i tried your solution and it works, BUT when i echo the GROUP_CONCAT('tags_name'), it only displays "tags_name" or "tags_name,tags_name", the value is the field's name and NOT the value itself... Weird.

So instead of giving : "environment,technology,economy" it gives "tags_name,tags_name,tags_name"

Any idea how to fix it ? I tried to add "themes.*" in the SELECT, but it gives the same error as before (Expression #2 of SELECT bla bla)