A sum and case query help

Question

I need help please with the following query.
I have a table that contains a currency, voucher, start_date and a value.
Data in the tables looks like this:
GB, 31/05/2010, A, 100
GB, 31/05/2010, B, 250
GB, 31/05/2010, A, 72
GB, 12/12/2009, A, 1000
GB, 12/12/2009, B, 72
LX, 12/05/2010, A, 90
This is where it gets complicated, I need to show the total(SUM) value when the start_date < 60 days from sysdate and also when the start_date > 61 days AND only if the voucher = A and partioned by the currency.
So, in other words I need my results like this.
GB, 31/05/2010, A, 100, *172, 0*
GB, 31/05/2010, B, 250, *0, 0*
GB, 31/05/2010, A, 72, *172, 0*
GB, 12/12/2009, A, 1000, *0, 1000*
GB, 12/12/2009, B, 72, *0, 0*
LX, 12/05/2010, A, 90, *90, 0*
The bold columns are what I need, one called less_than and one more_than.
A big big thank you and any advice I appreciate.
S

Answer 1

Please make a habit of posting sample data we can work with right away by using CREATE TABLE and INSERT INTO statements, or use the WITH clause as shown below:
SQL> with t as ( -- generating sample data:
  2  select 'GB' currency, to_date('31/05/2010', 'dd/mm/yyyy') start_date, 'A' voucher, 100 value from dual union
  3  select 'GB', to_date('31/05/2010', 'dd/mm/yyyy'), 'B', 250 from dual union
  4  select 'GB', to_date('31/05/2010', 'dd/mm/yyyy'), 'A', 72 from dual union
  5  select 'GB', to_date('12/12/2009', 'dd/mm/yyyy'), 'A', 1000 from dual union
  6  select 'GB', to_date('12/12/2009', 'dd/mm/yyyy'), 'B', 72 from dual union
  7  select 'LX', to_date('12/05/2010', 'dd/mm/yyyy'), 'A', 90 from dual
  8  )
  9  --
10  -- actual query:
11  --
12  select currency
13  ,      start_date
14  ,      voucher
15  ,      value
16  ,      sum(case
17               when  trunc(sysdate-start_date)< 60
18               and  voucher = 'A'
19               then value
20               else 0
21             end) over (partition by currency, voucher, start_date) sum_val1
22  ,      sum(case
23               when trunc(sysdate-start_date)> 61
24               and  voucher = 'A'
25               then value
26               else 0
27             end) over (partition by currency, voucher, start_date) sum_val2
28  from   t;
CU START_DAT V      VALUE   SUM_VAL1   SUM_VAL2
GB 12-DEC-09 A       1000          0       1000
GB 31-MAY-10 A         72        172          0
GB 31-MAY-10 A        100        172          0
GB 12-DEC-09 B         72          0          0
GB 31-MAY-10 B        250          0          0
LX 12-MAY-10 A         90         90          0
6 rows selected.