How to convert Oracle function in UDB

Hi ,
i am writing this function in oracle.Could you please convert this function in UDB because i am new in this and dont know how to use decode function in UDB
Please following is the code for oracle.
CREATE OR REPLACE function fun ( localex varchar2,titlex varchar2)
return number
as x number;
begin
select sum ( decode (count (username),max(prereq_count),1,0) ) x into x from
SELECT
prereq_count,
username
FROM
table1
group by username ;
return x;
end fun;
Regards
Vishal

First, you posted in the wrong forum for UDB, this is DB2 on z/OS
Secondly, your question is not SAP related (at least I can't see that).
Thirdly, you posted the same question for SQL-Server:
want to convert function in SQL Server 2000
Markus

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Edited by: _Locutus on Apr 2, 2009 2:37 PM

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