Count Records in Form?

Hi,
Please consider simple example of developer/2000 Form6i and emp table.

I want to display record according to the below sample. Can any one help how it is possible count(*) in Form.
e.g
deptno 10
# of emp 3


**** I know how to check in Reports but how it is possible in FORM, no idea.

SQL> select deptno, count(*) no_of_emp from emp
group by deptno;

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

Thanks in advance.

Simplest way to do that is:

1) dept is a base table for a block
(with select ... from dept ...)
2) in this (dept) block u have to create not database field :cnt for example.
3) create POST-QUERY trigger for block dept,

POST-QUERY trigger:

begin
select count(*) into :dept.cnt from emp where deptno = :dept.deptno;
end;

that is it.