How free up tablespace space

Question

Platform: 4u7
Database: 11.2.0.1 (Single instance)
I had the tablespace USERS1 with *100MB* size and *~96%* free. Then I did following:
SQL> create table t1 (c1 number);
Table created.
SQL> set verify off
SQL> set serveroutput on
SQL> begin
2 for i in 1..100000 loop
3 insert into t1 values('1');
4 end loop;
5 end;
6 /
PL/SQL procedure successfully completed.
SQL> begin
2 for i in 1..10000 loop
3 insert into t1 select * from t1;
4 end loop;
5 end;
6 /
AND then I got error:
ORA-01653: unable to extend table SCOTT.T1 by 1024 in tablespace USERS1
ORA-06512: at line 3
then i did "rollback" from the same session, but still the free space of USERS1 tablespace is *3MB ONLY*.
My question is how can i get the space released from this tablespace as when I've rolledback the transactions? Please help.

Answer 1

then i did "rollback" from the same session, but still the free space of USERS1 tablespace is *3MB ONLY*.
My question is how can i get the space released from this tablespace as when I've rolledback the transactions? Please help.
col tablespace_name format a15
col file_size format 99999
col file_name format a50
col hwm format 99999
col can_save format 99999
SELECT tablespace_name, file_name, file_size, hwm, file_size-hwm can_save
FROM (SELECT /*+ RULE */ ddf.tablespace_name, ddf.file_name file_name,
ddf.bytes/1048576 file_size,(ebf.maximum + de.blocks-1)*dbs.db_block_size/1048576 hwm
FROM dba_data_files ddf,(SELECT file_id, MAX(block_id) maximum FROM dba_extents GROUP BY file_id) ebf,dba_extents de,
(SELECT value db_block_size FROM v$parameter WHERE name='db_block_size') dbs
WHERE ddf.file_id = ebf.file_id
AND de.file_id = ebf.file_id
AND de.block_id = ebf.maximum
ORDER BY 1,2); Output sample:-
TABLESPACE_NAME FILE_NAME                                          FILE_SIZE    HWM CAN_SAVE
EXAMPLE         C:\ORACLE\APP\ORADATA\CKPT\EXAMPLE01.DBF                 100     81       19
SYSAUX          C:\ORACLE\APP\ORADATA\CKPT\SYSAUX01.DBF                  500    480       20
SYSTEM          C:\ORACLE\APP\ORADATA\CKPT\SYSTEM01.DBF                  690    681        9
UNDOTBS1        C:\ORACLE\APP\ORADATA\CKPT\UNDOTBS01.DBF                  55     43       12
USERS           C:\ORACLE\APP\ORADATA\CKPT\USERS01.DBF                    28     10       18Now post this query output. You can see changes.