Question

I have a relational database in this format

Table: posts
Columns: post_id,post_title,post_content

Table: categories
Columns: category_id,category_name

Table: posts_categories
Columns: post_id,category_id

Posts can have multiple categories so i store them in posts_categories using post and category id, when i get results from database using below query, it just display the last category, Is it possible to display all categories otherwise i have to run a separate query, here my code.

    $this->db->select("p.*,pc.*,c.*");
    $this->db->where('post_id', $id); 
    $this->db->from('posts AS p');
    $this->db->join('posts_categories AS pc', 'pc.post_id = p.post_id', 'inner');
    $this->db->join('categories AS c', 'pc.category_id = c.category_id', 'inner');
    $q = $this->db->get();

Thanks for any help.

Answer 1

You didn’t mention what fields you actually select. However, you can SELECT p.title, c.category_name and after doing your query (mentioned in the question), you should have multiple rows in your result, containing the posts title and a category name for that post.

Now if you want you can group these categories by posts in php, building a new array from the db result.