2-table join where only need one row of second table.

[Clinton Pierce]

For discussion sake, I've got two tables: customers and orders. What I want
is a query that will return the most recent order for each customer. Let's
say the tables are like:

Customer: customerId, customerName
Orders: orderId, customerId, orderDate

The simple joins I've done give me back all of the orders for all of the
customers.

Any advice?

[bagieta]

Try

select * from customer c, orders o
where c.customerId = o.customerId
and c.orderId =
(
select max (o2.orderDate)
from orders o2
where o2.customerId = c.customerId
)

--
Regards Bagieta
~~~~~~~~~~~~~~~~~~~~~~~~~~~
dbDeveloper - Multiple databases editor
http://www.prominentus.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~