SQL> drop tablespace DATA including contents and datafiles; drop tablespace DATA including contents and datafiles * ERROR at line 1: ORA-00604: error occurred at recursive SQL level 1 ORA-38301: can not perform DDL/DML over objects in Recycle Bin
SQL> ALTER SYSTEM SET recyclebin = OFF DEFERRED; System altered.
SQL> drop tablespace DATA including contents and datafiles; Tablespace dropped.
SQL > ALTER SYSTEM SET recyclebin = ON DEFERRED; System altered.