SQL> create table TAB_2_DROP as select * from user_objects;

Table created.

SQL> create table TAB_2_TRUNCATE as select * from user_objects;

Table created.

SQL> select count(*) from TAB_2_DROP;

  COUNT(*)
----------
        64

SQL> select count(*) from TAB_2_TRUNCATE;

  COUNT(*)
----------
        65

SQL> -- TAB_2_TRUNCATE found 1 more entry -- that for TAB_2_DROP -- in user_objects
SQL> drop table TAB_2_DROP ;

Table dropped.

SQL> truncate table TAB_2_TRUNCATE ;

Table truncated.

SQL> flashback table TAB_2_DROP to before drop;

Flashback complete.

SQL> select count(*) from TAB_2_DROP;

  COUNT(*)
----------
        64

SQL> flashback table TAB_2_TRUNCATE to before truncate;
flashback table TAB_2_TRUNCATE to before truncate
                                  *
ERROR at line 1:
ORA-00905: missing keyword


SQL>