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set lines 155
compute sum of totalsize_megs on report
break on report
col owner for a20
col segment_name for a30
col segment_type for a10
col totalsize_megs for 999,999.9
select s.owner, segment_name,
sum(bytes/1024/1024) as totalsize_megs, compress_for
from dba_segments s, dba_tables t
where s.owner = t.owner
and t.table_name = s.segment_name
and s.owner like nvl('&owner',s.owner)
and t.table_name like nvl('&table_name',segment_name)
group by s.owner, segment_name, compress_for
order by 3;