I dont get your requirement exactly.
But u can make use of FUNCTIONS in view definitions.
Say, u can create some fucntion ( that does your logic)
and make use of it in the view defintion.
here i used the builin function COUNT
local@ >ed
Wrote file afiedt.buf

  1  create view ssd
  2  as select deptno,count(deptno) cnt from emp
  3*    group by deptno
local@ >/

View created.

Local@ >select * from ssd;

    DEPTNO        CNT
---------- ----------
        10          3
        20          5
        30          6