Re: using LIMIT only on primary table

On Sat, 2 Mar 2002 17:35:31 -0500
"Dan Langille" <dan(at)langille(dot)org> wrote:

> If I want the last 100 orders:
>
> SELECT * FROM orders LIMIT 100;
>
> 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
>
> But that will only give me the last 100 items, not 100 orders.
>
> What I really want is
>
> SELECT *
> from orders, order_items
> where order_items.order_id = orders.id
> and exists
> (SELECT * from orders order by ID DESC limit 100);

This probably gives you all the items on the last 100 orders.

select *
from (select * from orders order by ID desc limit 10) as o
inner join order_items as oi
on (oi.order_id = o.order_id)
;

>
> But that gives me all orders, not just the first 100.
>
> Adding a LIMIT 100 to the above doesn't work either. It equates to the
> first example.

Regards,
Masaru Sugawara