选择类别和文章

Question

I have a question regarding MySQL. (&Php)

I have 3 tables:

Articles (id, title, content)
Articles_category (id,article_id,category_id,main,cposition)
Categories (id,title,content)

main - 0/1 (main category or not). cposition - position on breadcrumbs - 1,2,3,... (or 0 - so it wont appear on breadcrumbs at all).

now, lets say i have 3 levels:

Home -> Articles -> News & Politics.

And I'm now going to - Articles.

I want Articles category to list all articles with their categories.

That means ->

Articles.

News & Politics 
 [article1]
 [article2]
Military 
 [article1]
 [article2]
-- (articles that their main category is Articles)
 [article1]
 [article2]
 [article3]

How do i fetch this data and parse it one query (and if not possible in one, whats the best way to do it efficiently?)

Answer 1

try like

select c.title, a.title from Articles a 
left join 
Articles_category b
on a.id=b.article_id
left join
Categories c
on c.id = b.category_id
order by b.main, c.id, b.cposition

Answer 2

为什么不把category_id放在文章表中？