Counting number of associated many-to-many items Hello!
I have three tables, mapping out a n:n relationship of authors and the
books they worked on:
table 1: authors (id, name)
table 2: authorships (author_id, book_id)
table 3: books (id, name, bestseller tinyint)
Here's two different queries I want to run:
1. Select each author, and how many books he has worked on.
2. Select each author, and how many bestseller books (bestseller = 1)
he has worked on.
Not exactly sure how to do this, can someone help me out with this?
Thank you,
Rob |