Urgent SQL help,

I have a statement in SQLRPGLE  which is as below:
                                          
 EVAL      PDateC =  XPrevYear + '1201'   
 
I want to replace this (XPrevYear + '1201'  )  with below SQL statement
 
select min(k00001)                  
from "Y.MAPS"                     
where k00001 > (' %' || '20041126') 
and substr(f00001,1,1) = 'M'        
 
I mean some thing below 
 
EVAL      PDateC = select min(k00001)                  
from "Y.MAPS"                     
where k00001 > (' %' || '20041126') 
and substr(f00001,1,1) = 'M'        
 
Iam not familiar with SQLRPGLE , can some one point me in right direction.
Thanks very much