How to make sum of child for parent?

[deib97]

I have one table but i try to make like the result not finished.

Hmm.. can you see my table :

I want to declare sum for parent kd_rekening in same row for "Anggaran" => jns_anggaran =1 and "Perubahan" => jns_anggaran = 2. And child ust load field nilai.

 

Thanks before