Thanks for your answer...

Yes,

Yesterday while I was driving, I though that it will work only for a single server, and it wont work in a clustered environment... but...

Thank you guys!,

Michael, Using "or" clausule looks much smarter than case, thanks for your advice.

I've tested and it's working fine now. THANK YOU!!!

Select ...

Where ((Contratos.GrupoCobranzaId = @GrupoCobranzaId) Or (@GrupoCobranzaId =...