Newbie Group by and Group by

Question

I can do a group by, but I need to have TWO Group by so my output would look like this
in ONE report:
Month Hours
Oct. 2008 10
Nov. 2008 17
Dec. 2008 14
Total 41
Produce Hours
Apples 7
Grapes 15
Peaches 8
Plums 11
Total 41
Below will give me the Produce total:
Select Sum(Phours) Shours,Pname from aims.dummy
group by Pname
=========================
Below will give it by Date:
Select Sum(Phours) Shours,Pdate from aims.dummy
group by Pdate
=========================
Here's my input example:
drop table dummy;
create table dummy(pname varchar2(20)
,Phours numeric(10,0)
,pdate date);
insert into dummy(pname,phours,pdate)
values('Apples',4,to_date('20081001','YYYYMMDD'));
insert into dummy(pname,phours,pdate)
values('Apples',3,to_date('20081101','YYYYMMDD'));
insert into dummy(pname,phours,pdate)
values('Grapes',3,to_date('20081001','YYYYMMDD'));
insert into dummy(pname,phours,pdate)
values('Grapes',12,to_date('20081201','YYYYMMDD'));
insert into dummy(pname,phours,pdate)
values('Peaches',3,to_date('20081001','YYYYMMDD'));
insert into dummy(pname,phours,pdate)
values('Peaches',5,to_date('20081101','YYYYMMDD'));
insert into dummy(pname,phours,pdate)
values('Plums',9,to_date('20081101','YYYYMMDD'));
insert into dummy(pname,phours,pdate)
values('Plums',2,to_date('20081201','YYYYMMDD'));
What is the best way to do this?
TIA
Steve

Answer 1

Like this...
SQL> select * from dummy;
PNAME                    PHOURS PDATE
Apples                        4 01-OCT-08
Apples                        3 01-NOV-08
Grapes                        3 01-OCT-08
Grapes                       12 01-DEC-08
Peaches                       3 01-OCT-08
Peaches                       5 01-NOV-08
Plums                         9 01-NOV-08
Plums                         2 01-DEC-08
8 rows selected.
SQL> break on type skip 1
SQL> ed
Wrote file afiedt.buf
  1  select 'By Month' as type, to_char(pdate,'Mon') as descript, sum(phours) as hrs
  2  from dummy
  3  group by to_char(pdate,'Mon')
  4  union all
  5  select 'By Produce', pname, sum(phours)
  6  from dummy
  7  group by pname
  8* order by 1,2
SQL> /
TYPE       DESCRIPT                    HRS
By Month   Dec                          14
           Nov                          17
           Oct                          10
By Produce Apples                        7
           Grapes                       15
           Peaches                       8
           Plums                        11
7 rows selected.
SQL>Of course you may want to change how the ordering is done so that the months come out in order for that group and the produce comes out alphabetically for the second group, but I'll leave that as a challenge for yourself. ;)