Saving articles and related categories according to normalization
问题 Saving articles_categories according to normalization I have three tables ----------- articles ----------- id int(11) title varchar(100) ----------- categories ---------- id int(11) title varchar(100) ------------------- articles_categories -------------------- articles_id int(11) categories_id int(11) I want to save it according to normalization rule to achieve like this articles_id | categories_id 1 1 1 2 1 3 How can I achieve with code igniter thanks. So far I had already tried like this