icemountain: SQL Chapter 4 Problems talks about some SQL issues.
Do you know what I am doing wrong? Or is it maybe just my computer?
Here's a query that works. It is a slightly edited version of the one I posted for question 11 (I miss-typed some column names, otherwise the same). It works for me:
select c.customer_num, c.customer_name
from customer c, orders o, order_line ol, part p
where c.customer_num = o.customer_num
and o.order_num = ol.order_num
and ol.part_num = p.part_num
and p.description = 'Iron';