function cf_mostrepfomula return char is

ret_val1 varchar2(20);

ret_val2 vachar2(20);

begin
select test_result,count(test_result) testcount into ret_val1,ret_val2

from lab_trx_details

where test-id=:test_id

and branch_id =:branch_id

having (count(test_result)>1)

group by test_result

order by test_count

if ret_val1 is not null then

return(ret_val1);
 else
retun 0;
 end if;
 end;