>CREATE PROCEDURE MyProc > @mytable_ID int, > @One char(1) = NULL, > @Two char(2) = NULL, > @Three char(3) = NULL >AS > >UPDATE mytable > SET one = ISNULL(@one, one), > two = ISNULL(@two, two) > three = ISNULL(@three, three) >WHERE > mytable_ID = @mytable_ID >>