问题
I have:
$this->db->select('GROUP_CONCAT(prod_poster, poster2, poster3, poster4, poster5, poster6, poster7)');
And I have error for this and shows sql query:
SELECT GROUP_CONCAT(prod_poster, `poster2`, `poster3`, `poster4`, `poster5`, `poster6`, `poster7)`
it's problem because of ->>>> ` near poster7. this symbol must be inside bracket. whyc codeigniter do like this? and how to fix it?
回答1:
Try doing:
$this->db->select('GROUP_CONCAT(prod_poster, poster2, poster3, poster4, poster5, poster6, poster7)', false);
If you pass false as the second argument of select(), it won't try to protect your query by adding in backticks (like it has in your example).
See: https://codeigniter.com/userguide2/database/active_record.html#select
来源：https://stackoverflow.com/questions/24546537/codeigniter-group-concat