Jörg,

sorry. I've overlooked this.
Yes, I think then you'll have to roll your own StoredProc.

For date calculations you may be able to use some of
the functions available at
http://www.interbase2000.org/doc_ostenried_1.htm

HTH,
Markus

At 15:27 11.11.2001 +0100, you wrote:

>Hi Markus,
>
>I meant the week of the year. (1-52(53))
>
>I think I've to write a SP.
>
>Thanks,
>Jörg