Please help! (creating new rows in a table)

Question

Hi guys.
I have the following table:
Guest ID | visit ID | start date | end date | days | total amount | avg amount
1234.......| 6750...| 01/01/08...| 20/01/08 | 20....| $2000.........| $100
Avg amount = amout per day = days/total amount
I need to figure out a way of summing up all the profits from, say, last 3 weeks, 2 months etc.
To do that, I am thinking of breaking up each stay period by days.
i.e. to create a new row in a table for each day.
So, for this example, we'd have 20 new rows,
with same guest iD and visit ID,
start date and end date are the same because we only count one day...
Guest ID | visit ID | start date | end date | days | total amount | avg amount
1234.......| 6750...| 01/01/08 ..| 01/01/08 | 1.......| $100............| $100
1234......| 6750....| 02/01/08 ..| 02/01/08 | 1.......| $100..........| $100
etc
The question is, is there any way to make oracle do this?
As in, to create new rows (maybe in a new table?)
Any help/ideas would be appreciated!
I am using Oracle SQL Plus 8.1.7.0.0

Answer 1

I have used all_objects to populate multiple records as you are living in stone age :-)
SQL> drop table temp;
Table dropped.
SQL> create table temp (
  2             Guest_ID integer primary key,
  3             visit_ID integer,
  4             start_date date,
  5             end_date date,
  6             days integer,
  7             total_amount integer,
  8             avg_amount integer);
Table created.
SQL> insert into temp values (1234, 6750, '01/jan/08', '20/jan/08', 20, 2000, 100);
1 row created.
SQL> commit;
Commit complete.
SQL> select t.guest_id,t.visit_id,t.start_date+rownum-1 start_date,t.start_date+rownum-1 end_date, 1 as days, avg_amount as total_amount, avg_amount
  2    from temp t,
  3         (select 1
  4       from all_objects,
  5           (select (end_date - start_date) + 1 day_count
  6              from temp t
  7             where guest_id = 1234)
  8        where rownum <= day_count);
  GUEST_ID   VISIT_ID START_DAT END_DATE        DAYS TOTAL_AMOUNT AVG_AMOUNT
      1234       6750 01-JAN-08 01-JAN-08          1          100        100
      1234       6750 02-JAN-08 02-JAN-08          1          100        100
      1234       6750 03-JAN-08 03-JAN-08          1          100        100
      1234       6750 04-JAN-08 04-JAN-08          1          100        100
      1234       6750 05-JAN-08 05-JAN-08          1          100        100
      1234       6750 06-JAN-08 06-JAN-08          1          100        100
      1234       6750 07-JAN-08 07-JAN-08          1          100        100
      1234       6750 08-JAN-08 08-JAN-08          1          100        100
      1234       6750 09-JAN-08 09-JAN-08          1          100        100
      1234       6750 10-JAN-08 10-JAN-08          1          100        100
      1234       6750 11-JAN-08 11-JAN-08          1          100        100
  GUEST_ID   VISIT_ID START_DAT END_DATE        DAYS TOTAL_AMOUNT AVG_AMOUNT
      1234       6750 12-JAN-08 12-JAN-08          1          100        100
      1234       6750 13-JAN-08 13-JAN-08          1          100        100
      1234       6750 14-JAN-08 14-JAN-08          1          100        100
      1234       6750 15-JAN-08 15-JAN-08          1          100        100
      1234       6750 16-JAN-08 16-JAN-08          1          100        100
      1234       6750 17-JAN-08 17-JAN-08          1          100        100
      1234       6750 18-JAN-08 18-JAN-08          1          100        100
      1234       6750 19-JAN-08 19-JAN-08          1          100        100
      1234       6750 20-JAN-08 20-JAN-08          1          100        100
20 rows selected.Thanks,
Karthick.