How to make a parameter base report?

Question

I am making a report on employees and departments but i want to choose employees for some required departments for that i need to use parameter, and i need help that how will i make a parameter in reports builder 10g.
I am able to do it by writing a where clause in query but now i want to do it from user parameters. Seek help here.
Maz

Answer 1

Here is a list of things to do. Let me know if anything is not clear.
1) In your main query create a lexical parameter at the very end of you where clause ( dont put and &p_where just &p_where)
&p_where
2)Create a user parameter with datatype character and width 200
ex: P_departments
3) Create a field on the Paper Parameter Form
4) Click on that field and go to the List of Values (if you want a lov...) and insert the following
Ex:
select 'All',' All Departments' from dual
union
select to_char(department),to_char(department)||' - '||department_name
from departments
order by 1
5) Go to Report Triggers > After Parameters and insert the following
Ex:
begin
:p_where := null;
if :p_departments not like '%All%' then
:p_where := :p_where ||' and table.department = '||:p_departments;
end if;
return (true);
end;
This will allow you to select a department or leave it at the default of all departments. It will also allow you to remove the hardcoded statement in your where clause such as
where department = 'HR'
Edited by: DOUBLE U on Aug 3, 2011 3:32 PM