Shrink datafiles in all tablespace below HWM

Shrink Data files in all tablespaces

Spool /tmp/shrink_tablespaces.sql

select 'alter database datafile ''' || file_name || ''' resize ' ||
ceil(ROUND((((nvl(hwm, 1) * &&BlockSize) / 1024 / 1024) + 50), -2)) || 'm' cmd
from dba_data_files a,
(select file_id, max(block_id + blocks - 1) hwm
from dba_extents
group by file_id) b
where a.file_id = b.file_id(+)
and ceil(blocks * &BlockSize / 1024 / 1024) -
ceil((nvl(hwm, 1) * &&BlockSize) / 1024 / 1024) > 0
and a.tablespace_name not in
('SYSTEM', 'TEMP', 'UNDO_SDATA01', 'UNDO_SDATA02')
/

spool off;

@/tmp/shrink_tablespaces.sql


Schema Size

select 'TABLE' "SEGMENT_TYPE",round(sum(bytes)/1024/1024/1024) "SIZE in GB" from dba_segments where owner='&OWNER'
and segment_type in('TABLE','TABLE PARTITION','LOBSEGMENT') group by 'TABLE'
UNION
select 'INDEX' "SEGMENT_TYPE",round(sum(bytes)/1024/1024/1024) "SIZE in GB" from dba_segments where owner='&OWNER'
and segment_type in('INDEX','INDEX PARTITION','LOBINDEX') group by 'INDEX'
/