Re: Need a Logic for balance

hi Rajesh,

I was on vacation for one week

i tried as per your above logic

for new_balance field upto 3 ranks i am getting correct but for rank 4 i am not getting as expected

i am using  balance - PAID_AMOUNT * (RANK -1)

for example

Input

balance  paid_amount rank ssn

1320        0                  1       111111111

1320        17                 2      111111111

1320        17                 3      111111111

1320         4                  4      111111111

Output

balance  paid_amount rank ssn                new_balance

1320        0                  1       111111111   1320

1320        17                 2      111111111   1303

1320        17                 3      111111111    1286

1320         4                  4      111111111    1308(should be 1284)

For the balance field, for rank 2 i am getting null

Using ifthenelse( RANK = 1, balance, previous_row_value(new_balance))

output getting as

balance  paid_amount rank ssn                new_balance

1320        0                  1       111111111   1320

null         17                 2      111111111   1303

1303        17                 3      111111111    1286

1286         4                  4      111111111    1308

any suggesion please

Thanks

Madhu