Crystal Reports Dynamic List of Values(Prompt)

Message


     I have created a dynamic list of values( prompt) and it's working fine. What I need to do is add 'All' to the list of values so what the user can run for all departments. 
I don't have any write access to the database. So it has to be done thru Crystal. Is there any way that I can add 'All' value to the department list of values that's coming from the database. 
 
I am new to Crystal but have used ORacle Reports in the past and i used to achieve this by doing a union
 
Select dept_name from dept
union
Select 'ALL' from dual
ORDER BY 1
Thanks