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Obtain Sum using 2 Tables

Author

Topic

gretty
Starting Member

6 Posts

Posted - 2009-10-16 : 00:09:37

Hello, I hope this makes sense :P

My objective is to:

quote:
List the book code, book title and the total number of copies on hand of each book. Order the list by book code.

I have 2 tables;
- book (where columns book_code & title are located)
- inventory (where columns on_hand & book_code(exactly the same as book_code from the previous table)

My problem is that I always get an error when I try to get the sum of total number of copies on hand of each book

Heres what I have which wont work: Any advice?


select book.book_code, title, sum(on_hand)
from book, inventory
where book.book_code = inventory.book_code
order by book_code asc;

Also this wont work also:

select book.book_code, title, sum(inventory.book_code*inventory.on_hand)
from book, inventory
where book.book_code = inventory.book_code
order by book_code asc;

lionofdezert
Aged Yak Warrior

885 Posts

Posted - 2009-10-16 : 01:33:40

SELECT book.book_code, title, sum(on_hand)
FROM book INNER JOIN inventory
ON book.book_code = inventory.book_code
GROUP BY book_code,title;

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