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SQL>
SQL> create table my_all_objects
2 nologging
3 as
4 select * from all_objects
5 union all
6 select * from all_objects
7 union all
8 select * from all_objects
9 /
Table created.
SQL>
SQL> set autotrace traceonly
SQL> select owner, count(*) from my_all_objects group by owner;
13 rows selected.
Execution Plan
----------------------------------------------------------
Plan hash value: 2509106709
-------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 33589 | 557K| 136 (6)| 00:00:02 |
| 1 | HASH GROUP BY | | 33589 | 557K| 136 (6)| 00:00:02 |
| 2 | TABLE ACCESS FULL| MY_ALL_OBJECTS | 33589 | 557K| 130 (2)| 00:00:02 |
-------------------------------------------------------------------------------------
Note
-----
- dynamic sampling used for this statement
Statistics
----------------------------------------------------------
48 recursive calls
0 db block gets
537 consistent gets
466 physical reads
0 redo size
694 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
13 rows processed
SQL> set autotrace off
SQL>
SQL> drop table my_all_objects;
Table dropped.
SQL>
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