2026-03-12 20:23:15

vdh/comp_ratio.sql

@@ -0,0 +1,17 @@
+set lines 155
+compute sum of totalsize_megs on report
+break on report
+col owner for a10
+col segment_name for a20
+col segment_type for a10
+col totalsize_megs for 999,999.9
+col compression_ratio for 999.9 
+select owner, segment_name, segment_type type,
+sum(bytes/1024/1024) as totalsize_megs,
+&original_size/sum(bytes/1024/1024) as compression_ratio
+from dba_segments
+where owner like nvl('&owner',owner)
+and segment_name like nvl('&table_name',segment_name)
+and segment_type like nvl('&type',segment_type)
+group by owner, segment_name, tablespace_name, segment_type
+order by 5;