Single row output

Question

Create table test_table ( metric_name varchar2(30), dt date, value number) ;
insert into test_table values ('METRIC_1', to_date('12/31/2013 08:00:00','mm/dd/yyyy hh24:mi:ss'), 10) ;
insert into test_table values ('METRIC_1', to_date('12/31/2013 09:00:00','mm/dd/yyyy hh24:mi:ss'), 20) ;
insert into test_table values ('METRIC_1', to_date('12/31/2013 10:00:00','mm/dd/yyyy hh24:mi:ss'), 30) ;
insert into test_table values ('METRIC_2', to_date('12/31/2013 08:00:00','mm/dd/yyyy hh24:mi:ss'), 11) ;
insert into test_table values ('METRIC_2', to_date('12/31/2013 09:00:00','mm/dd/yyyy hh24:mi:ss'), 22) ;
insert into test_table values ('METRIC_2', to_date('12/31/2013 10:00:00','mm/dd/yyyy hh24:mi:ss'), 33) ;
commit;
SQL> alter session set nls_date_format='mm/dd/yyyy hh24:mi:ss' ;
Session altered.
SQL> select * from test_table ;
METRIC_NAME                    DT                       VALUE
METRIC_1                       12/31/2013 08:00:00         10
METRIC_1                       12/31/2013 09:00:00         20
METRIC_1                       12/31/2013 10:00:00         30
METRIC_2                       12/31/2013 08:00:00         11
METRIC_2                       12/31/2013 09:00:00         22
METRIC_2                       12/31/2013 10:00:00         33
My intentended output is as follows:
METRIC_NAME    12/31/2013 08:00:00       12/31/2013 08:00:00         12/31/2013 08:00:00
  METRIC_1                     10                                    20                                30
  METRIC_2                      11                                   22                                33
The date columns will be more 24 for a day with 1 hour interval. So i want to print all 24 values in a single row for each metric.
Any help is much appreciate.
-Thanks

Answer 1

You could also use just the hours for the headers ...
with w_data as (
   select metric_name, value,
          (dt - trunc(dt))*24  dt_hour
      from test_table
select  *
  from  w_data
  pivot(
        sum(value)
        for dt_hour in (6,7,8,9,10,11,12,13,14,15)
  order by metric_name
METRIC_NAME                             6          7          8          9         10         11         12         13         14         15
METRIC_1                                                     10         20         30
METRIC_2                                                     11         22         33
That removes some of the "have to know the date" that Solomon points out
(I just listed 6-15 . but you could list full 1-24 if you needed it)