Need a group by clause for two varibles in one table

Question

I can't find any way to merge two variables in a group by statement with both vertical and horizobtable output.
The statement I got for a vertical output is (in 10gR2):
select to_char(d.begin_interval_time, 'YYYY-MM-DD') as Datenumber,
w.wait_class as Type,
round(sum(w.total_waits)/1024/1024, 0) as "Tot-waits"
from dba_hist_snapshot d, dba_hist_bg_event_summary w
where d.snap_id = w.snap_id
group by to_char(d.begin_interval_time, 'YYYY-MM-DD'), w.wait_class
order by to_char(d.begin_interval_time, 'YYYY-MM-DD');
2010-02-28 System I/O 234567
2010-02-28 User I/O 34444
2010-03-01 System I/0 773777
But I wanted to have the following summary output in one SQL:
System I/O User I/O Idle Commit .... and so on
2010-02-26 3442322 344555 335455 5
2010-02-27 533222 2233 445455 2334
2010-02-28 3434444 244444 345555 39
2010-03-01 34444 55445 3444 534
Anyone have a idea?

Answer 1

Do you mean this?
SQL> select to_char(d.begin_interval_time, 'YYYY-MM-DD') as Datenumber,
  2  round(sum(decode(w.wait_class,'Concurrency', w.total_waits/1024/1024, 0)),0) as "Concurrency",
  3  round(sum(decode(w.wait_class,'System I/O', w.total_waits/1024/1024, 0)),0) as "System I/O",
  4  round(sum(decode(w.wait_class,'User I/O', w.total_waits/1024/1024, 0)),0) as "User I/O",
  5  round(sum(decode(w.wait_class,'Configuration', w.total_waits/1024/1024, 0)),0) as "Configuration",
  6  round(sum(decode(w.wait_class,'Other', w.total_waits/1024/1024, 0)),0) as "Other",
  7  round(sum(decode(w.wait_class,'Commit', w.total_waits/1024/1024, 0)),0) as "Commit",
  8  round(sum(decode(w.wait_class,'Idle', w.total_waits/1024/1024, 0)),0) as "Idle"
  9  from dba_hist_snapshot d, dba_hist_bg_event_summary w
10  where d.snap_id = w.snap_id
11  group by to_char(d.begin_interval_time, 'YYYY-MM-DD')
12  order by to_char(d.begin_interval_time, 'YYYY-MM-DD');
DATENUMBER Concurrency System I/O   User I/O Configuration      Other     Commit       Idle
2010-02-22           1        298          0             0          2          0       2107
2010-02-23           1        299          0             0          2          0       2114
2010-02-24           1        300          0             0          2          0       2121
2010-02-25           1        301          0             0          2          0       2129
2010-02-26           1        303          0             0          2          0       2136
2010-02-27           1        304          0             0          2          0       2143
2010-02-28           1        305          0             0          2          0       2150
2010-03-01           0        140          0             0          1          0        988Max
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