Given the table and data below, without joining the table to itself, how do

Question

Hi
could you please help me about following?
create table units
( report_date date
, company_id number
, units number );
insert into units values ('1-jan-2010', 1, 28);
insert into units values ('3-jan-2010', 2, 20);
insert into units values ('7-jan-2010', 2, 10);
insert into units values ('1-jan-2010', 2, 10);
insert into units values ('2-jan-2010', 1, 30);
insert into units values ('3-jan-2010', 1, 49);
insert into units values ('4-jan-2010', 2, 40);
I want the report to look like this:
Company_id | report_date | daily_units | month_to_date_units
1 | 1/1/2010 | 28 | 28
1 | 1/2/2010 | 30 | 58
1 | 1/3/2010 | 49 | 107
2 | 1/1/2010 | 10 | 10
2 | 1/3/2010 | 20 | 30
2 | 1/4/2010 | 40 | 70
2 | 1/7/2010 | 10 | 80
Regards

Answer 1

Hi,
Try this:
SQL> ed
Wrote file afiedt.buf
  1  select report_date,company_id,units ,
  2* SUM(units) OVER ( PARTITION BY company_id,TO_CHAR(report_date,'MON-YY') ORD
ER BY company_id,report_date) FROM units
SQL> /
REPORT_DA COMPANY_ID      UNITS
SUM(UNITS)OVER(PARTITIONBYCOMPANY_ID,TO_CHAR(REPORT_DATE,'MON-YY')ORDERBYCOMPANY
01-JAN-10          1         28
                                                                              28
02-JAN-10          1         30
                                                                              58
03-JAN-10          1         49
                                                                             107
01-JAN-10          2         10
                                                                              10
03-JAN-10          2         20
                                                                              30
04-JAN-10          2         40
                                                                              70
07-JAN-10          2         10
                                                                              80
7 rows selected.