Re: using LIMIT only on primary table

On 2 Mar 2002 at 18:22, Tom Lane wrote:

> "Dan Langille" <dan(at)langille(dot)org> writes:
> > If I want all the items on the last 100 orders, I'd start like this:
>
> > SELECT *
> > from orders, order_items
> > where order_items.order_id = orders.id
> > LIMIT 100
>
> I think you want
>
> SELECT *
> from
> (SELECT * from orders order by ID DESC limit 100) as recent_orders,
> order_items
> where order_items.order_id = recent_orders.id

That is it Tom. Thank you. As soon as I saw your solution, I thought of
creating a view to do this.

CREATE VIEW recent orders AS
SELECT * from orders
order by ID DESC
limit 100;

Which makes the query:

SELECT *
from recent_orders, order_items
where order_items.order_id = recent_orders.id

Cheers
--
Dan Langille
The FreeBSD Diary - http://freebsddiary.org/ - practical examples