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finding distinct values in a partition query

finding distinct values in a partition query

finding distinct values in a partition query

(OP)
I have a data set that looks something like this in a table

storeID      DealerCD      DealerName      DealerPermit
-------      --------      ----------      ----------
1111          980038         John           PAC
1111          980041         Bill           NAC
1111          980041         Bill           TTR
1131          987789         Greg           PAC
1131          983434         Rudy           PAC
1131          988232         Amy            NAC
1131          988234         Chris          NAC

What I want is this.

storeID      DealerCD      DealerName      DealerPermit Count
-------      --------      ----------      ----------   -----
1111          980038         John           PAC          2
1111          980041         Bill           NAC          2
1111          980041         Bill           TTR          2
1131          987789         Greg           PAC          4
1131          983434         Rudy           PAC          4
1131          988232         Amy            NAC          4
1131          988234         Chris          NAC          4


What I want to do is partition by storeID and for each store I want to count the distinct dealers in that store. The query that I have is something like this

select storeID, DealerCD,DealerName,DealerPermit,
count(DealerCD) over (partition by storeid) from Mytable
group by storeID, DealerCD, DealerName, DealerPermit.

what I am getting is for storeID 1111 I am getting the count as 3 and for storeID 1131 as 4. I want to get the count=2 for storeID = 1111 since there are only two distinct dealers working in that store.

Any help would be highly appreciated.

thanks
bcd

RE: finding distinct values in a partition query

Maybe something like:

select storeID, DealerCD,DealerName,DealerPermit,
       (SELECT COUNT(DISTINCT DealerName) FROM Mytable
        where Mytable.storeID = M.storeID)
from Mytable as M

RE: finding distinct values in a partition query

(OP)
Thanks JarlH, the query works on other databases but unfortunately this doesnot work on Teradata. sorry should have mentioned that earlier.

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