group by - SQL Select from a single compound table -

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i'm new sql, apologies if got nomenclature wrong (or if solution blindingly obvious).

my code like:

select client_id, max(year_end_date),  acct_nbr      (          --  ** subquery **  ) aa     group client_id, acct_nbr;

the columns in subquery same main query. duplicates in answer - meaning same given client_id db2 returns multiple rows different dates - example 

client_id | year_end_date | acct_nbr    ------------------------------------- 20001       2003-12-31      01     20001       2005-12-31      01

any idea why?

try this:

select '>>' || client_id || '<<', max(year_end_date), '>>' || acct_nbr || '<<'  (          --  ** subquery **  ) aa     group client_id, acct_nbr;

you can try calling trim() on client_id , acc_nbr fields in sub-query. think have hidden spaces there.


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