Re: generating the average 6 months spend excluding first orders

On Wed, Nov 26, 2014 at 10:55 AM, Ron256 [via PostgreSQL] <
ml-node+s1045698n5828385h59(at)n5(dot)nabble(dot)com> wrote:

>
> David, I made a few changes to my query and looks like I am moving in the
> right direction
> I have also attached my output.
>
> WITH first_cust_cte AS
> (
> SELECT min(ord_submitted_date)ord_date
> , persistent_key_str
> FROM orders
> group by persistent_key_str
> )
> SELECT o.persistent_key_str, o.ord_id
> FROM orders o INNER JOIN first_cust_cte c
> ON o.persistent_key_str = c.persistent_key_str
> WHERE ord_submitted_date = ord_date[image: My output]
>
> Thanks,
>
> Ron
>

​Your query assumes that a person cannot place two orders on the same day -
notes rows 3 & 4. If the actual date field had second or smaller precision
this will probably be OK...​

David J.

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