SQL>
SQL> create table t as select * from all_objects where 1=0;
Table created.
SQL>
SQL> select * from t;
no rows selected
SQL>
SQL> set autotrace traceonly statistics
SQL>
SQL> select * from t;
no rows selected
Statistics
----------------------------------------------------------
0 recursive calls
0 db block gets
3 consistent gets
0 physical reads
0 redo size
995 bytes sent via SQL*Net to client
369 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
0 rows processed
SQL>
SQL> set autotrace off
SQL>
SQL> insert into t select * from all_objects;
12599 rows created.
SQL>
SQL> rollback;
Rollback complete.
SQL>
SQL> select * from t;
no rows selected
SQL>
SQL> set autotrace traceonly statistics
SQL>
SQL> select * from t;
no rows selected
Statistics
----------------------------------------------------------
0 recursive calls
0 db block gets
166 consistent gets
0 physical reads
0 redo size
995 bytes sent via SQL*Net to client
369 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
0 rows processed
SQL>
SQL> set autotrace off
SQL>
SQL> drop table t;
Table dropped.
SQL>