Try:
select username, avg(date_difference) from sample_request_average_days
group by salesperson, to_char( date_shipped, 'YYYYMM');
Hunter Hillegas wrote:
>
> Someone asked me to create a query for them that would compute some averages
> for them over time.
>
> Basically I have a view that looks like this:
>
> sample_request_line_item_number | integer |
> sample_origin | character varying |
> date_of_request | timestamp with time zone |
> username | character varying |
> date_shipped | date |
> date_difference | double precision |
>
> I have a query that does what I need:
>
>
> date_shipped between '2002-11-01' and '2002-11-30' group by username;
>
> Basically it is getting the average number of days it took to ship something
> by salesperson, by month.
>
> The problem is that I want it to print the results for each month for which
> there are entries (without hard-coding dates).
>
> Is there any easy way to do this that I'm missing?
>
> Any help appreciated. Please reply off-list to minimize noise.
>
> Thanks,
> Hunter
>
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