Date: Wed, 19 Jan 2022 13:40:59 +0100
From: Richard Klingler <richard@klingler.net>
To: pgsql-sql@lists.postgresql.org
Message-ID: <20220119134059286538.4c015b19@klingler.net>
In-Reply-To: <9713782b-9c29-2497-be30-6dd1af0d550c@gmail.com>
References: <20220119120317479683.54287f97@klingler.net>
 <9713782b-9c29-2497-be30-6dd1af0d550c@gmail.com>
Subject: Re: Clean up shop database
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Archived-At: 
 <https://www.postgresql.org/message-id/20220119134059286538.4c015b19%40klingler.net>
Precedence: bulk

Odd...gives me the same result....

Tried another approach as the ordered is known where to start 
from....but still the same:

select p.productid as id, p.name_de as name
from product p, orderitems i,orders
where p.productid = i.orderitems2productid
and i.orderitems2orderid = orders.orderid
and orders.orderid < 14483
and p.pieces < 1
and p.active = 't'
group by id
order by id desc

Still lists products after January 1st 2021...but I know what is going 
on....

For example the query above returns as the first product id 47387:

id		name
47387	Carpet 70x120cm
47373	Mug Mynte Lavender

Now when I look for order items where this product is:

select o.orderid, o.orderdate, i.orderitemsid, p.productid
from orders o, orderitems i, product p
where p.productid = 47387
and p.productid = i.orderitems2productid
and o.orderid = i.orderitems2orderid

It gives me:

orderid	orderdate	orderitemsid	productid
19157	2021-02-08	88304		47387
17600	2020-10-13	81281		47387
14462	2019-12-28	67561		47387


So the initial query somehow gives all products that have been ordered 
at least before January 1st 2021
but not only before that date.


cheers
richard


On Wed, 19 Jan 2022 05:04:09 -0700, Rob Sargent wrote:
> On 1/19/22 04:03, Richard Klingler wrote:
>> Good morning (o;
>> 
>> 
>> I am in the process of migrating an online shop to another system and
>> therefore
>> also want to clean out products that haven't been re-stocked for a time.
>> 
>> Now this simple query returns all order ids younger than 750 days:
>> 
>> select orderid, orderdate from orders
>> where (now() - orderdate) < INTERVAL '1000 days'
>> order by orderdate asc
>> 
>> So it shows me orders beginning from January 1st 2020...all fine.
>> 
>> 
>> Now I want to list all products which stock is 0 and have only been
>> ordered
>> before those 750 days..so I use the above query in wrap it in the select
>> with a "not in":
>> 
>> select p.productid as id, p.name_de as name
>> from product p, orderitems i, orders
>> where p.productid = i.orderitems2productid
>> and i.orderitems2orderid not in (select orderid from orders where
>> (now() - orderdate) < INTERVAL '750 days')
>> and p.pieces < 1
>> and p.active = 't'
>> group by id
>> order by id desc
> something like this?
> 
> select p.productid as id, p.name_de as name
> from product p join orderitems i on p.productid = i.orderitems2productid
> join orders o on i.orderid = o.orderid
> where o.orderdate < 'January 1st 2020'
> and p.pieces < 1
> and p.active = 't'
> group by id
> order by id desc
>> 
>> 
>> Besides that this query takes over 70 seconds...it also returns
>> products that have been ordered after January 1st 2020.
>> 
>> So somehow this "not in" doesn't work as I am expecting it (o;
>> 
>> 
>> thanks in advance
>> richard
>> 
>> 
>> 
> 
> 
>