Analytical function sum() ...for Till-date reporting

Question

Hi,
I need help in forming an SQL with analytical function.
Here is my scenario:
create table a (name varchar2(10), qty_sold number,on_date date);
insert into a values ('abc',10,'10-JAN-2007 00:01:00');
insert into a values ('abc',01,'10-JUL-2007 00:01:00');
insert into a values ('abc',05,'10-JUL-2007 08:11:00');
insert into a values ('abc',17,'10-JUL-2007 09:11:00');
insert into a values ('def',10,'10-JAN-2006 08:01:00');
insert into a values ('def',01,'10-JUN-2006 10:01:00');
insert into a values ('def',05,'10-JUL-2006 08:10:00');
insert into a values ('pqr',17,'10-JUL-2006 09:11:00');
Now I want to have a sql which displays the following:
NAME--TOTAL_QTY_SOLD_IN_LAST_10_DAYS, TOTAL_QTY_SOLD_IN_LAST_20_DAYS...etc
I know we can do it using sum(qty_sold) over (order on_date range interval '10' days and preceding) .... but I get too many rows for each "NAME" ....for each of the date in the database table a ... I want just one row for each "Name"...and sum() should be till SYSDATE ....
Any help is highly appreciated.
Thanks.

Answer 1

SQL> select name
  2       , sum(case when sysdate - on_date <= 10 then qty_sold end) total_qty_last_10_days
  3       , sum(case when sysdate - on_date <= 100 then qty_sold end) total_qty_last_100_days
  4       , sum(case when sysdate - on_date <= 500 then qty_sold end) total_qty_last_500_days
  5    from a
  6   group by name
  7  /
NAME          TOTAL_QTY_LAST_10_DAYS   TOTAL_QTY_LAST_100_DAYS   TOTAL_QTY_LAST_500_DAYS
abc                                                         23                        33
def                                                                                    6
pqr                                                                                   17
3 rijen zijn geselecteerd.Regards,
Rob.