In Oracle there is a mechanism to generate sequence numbers e.g.;

CREATE SEQUENCE supplier_seq

    MINVALUE 1
    MAXVALUE 999999999999999999999999999
    START WITH 1
    INCREMENT BY 1
    CACHE 20;

And then execute the statement

supplier_seq.nextval

to retrieve the next sequence number.

How would you create the same functionality in MS SQL Server ?

Edit: I'm not looking for ways to automaticly generate keys for table records. I need to generate a unique value that I can use as an (logical) ID for a process. So I need the exact functionality that Oracle provides.