Hi Gunnar,

You're welcome.

>Hello Sergey
>
>Thank you very much for your reply. As usualy you came through with flying colors! It works. that was exactly what i was looking for. It's so simple, i can't belive it.
>
>Thanks again for your continues help here on UT!
>
>
>>Try

count(DIST a.oeno) as oecount, ;

>>