Question

I am working on a website where i have three tables
1:- Book Author
2:- Book type
3:- Book relationship

My first table have following fields 
-------------------
id  Author_name
1   abc
2   xyz
------------------

Second table

id  book_type
1   Politics
2   Religious

------------------

Third table

id   book_type_id   author_id
1       1             1
2       1             2

----------------------

On my webpage when a visitor clicks on a category i am getting the book_type. Now i want to get the author name having category 1 from author name table. I think i have explained clearly. if any one can solve this issue… Thanks

Answer 1

select * from book_author where id in (select author_id from book_relationship where book_type_id = 'selected_category_id')