Если вам нужно NULL, используйте NULL
select from table as A {
A.objek,
max(case when A.atinn = '0000010530'
then fltp_to_dec( A.atflv as abap.dec(5,3)
else NULL end ) as DDC
}
group by A.objek
или ничего, как предложено Ларну
select from table as A {
A.objek,
max(case when A.atinn = '0000010530'
then fltp_to_dec( A.atflv as abap.dec(5,3)
end ) as DDC
}
group by A.objek