Re: Counting Occurrences with SQL

[Charles Wilt <charles.wilt@xxxxxxxxx>]

with date_tbl as (select dte1, ROW_NUMBER() OVER (ORDER BY dte1) as Date_Nbr
                         from ctsc_w.pete
                         group by dte1)
select p.fld1, p.dte1, Date_Nbr, p.dte2
from ctsc_w.pete P
   join date_tbl using(dte1)
order by date_Nbr;

HTH,
Charles

On Mon, Mar 7, 2011 at 3:40 PM, Pete Helgren <pete@xxxxxxxxxx> wrote:
> I am have a data set that looks like the following:
>
> BB8179      04/17/11     04/02/11
> BE7214      04/17/11     04/02/11
> BD9607      04/17/11     04/02/11
> BB6382      04/17/11     04/02/11
> BB7942      04/17/11     04/02/11
> BE7487      04/17/11     04/02/11
> BE7488      04/18/11     04/02/11
> BE2178      04/18/11     04/02/11
> BE1618      04/18/11     04/02/11
> BE7489      04/18/11     04/02/11
> BE2179      04/18/11     04/02/11
> BD9608      04/21/11     04/02/11
> BE2180      04/21/11     04/02/11
> BE8955      04/21/11     04/02/11
> BE1696      04/21/11     04/02/11
>
> What I would like to do is count the unique occurrences of the first
> date column.  Something like:
>
> BB8179      04/17/11   1  04/02/11
> BE7214      04/17/11   1  04/02/11
> BD9607      04/17/11   1  04/02/11
> BB6382      04/17/11   1  04/02/11
> BB7942      04/17/11   1  04/02/11
> BE7487      04/17/11   1  04/02/11
> BE7488      04/18/11   2  04/02/11
> BE2178      04/18/11   2  04/02/11
> BE1618      04/18/11   2  04/02/11
> BE7489      04/18/11   2  04/02/11
> BE2179      04/18/11   2  04/02/11
> BD9608      04/21/11   3 04/02/11
> BE2180      04/21/11   3  04/02/11
> BE8955      04/21/11   3  04/02/11
> BE1696      04/21/11   3  04/02/11
>
> Actually there are more columns involved here but this data set
> illustrates the challenge.  Can't seem to wrap my head around the whole
> thing but I may need a subselect to get the count of the occurrences...
>
> Thanks
>
> --
> Pete Helgren
> Value Added Software, Inc
> www.asaap.com
> www.opensource4i.com
>
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