Question

Database is like:

table book: book_id, title

table wrote: book_id, author_id, author_order

table author: author_id, author_name

Every book is written by several person and have author_order.

I need to output using c program like:

book_id

authors: author1, author2, ... , authork

title

Now I’m using a cursor to fetch the book_id and title, but how to get all the authors who wrote a book?

Answer 1

Your data model is pretty straightforward, all I would think you would need is a join from author to wrote to book.

SELECT author_id, author_name, bookid, title
  FROM author
  JOIN wrote 
    ON (author.authorid = wrote.authorid)
  JOIN book
    ON (wrote.bookid = book.bookid)