Counting all the posts belonging to a category AND its subcategories

Question

I would really appreciate some help with my problem:

I have 2 MySQL tables, categories and posts, laid out (simplified) like so:

categories:

Answer 1

I think you want to look at the Rollup operator. I believe this will get you what you want.

http://msdn.microsoft.com/en-us/library/ms189305(SQL.90).aspx

Randy