ORACLE 查询表空间中对象的大小

 select A.tablespace_name , A.segment_type, A.Segment_Name,Sum(A.bytes)/1024/1024 as 占用空间(M) from user_extents A

 where A.tablespace_name = 'RAS'

 group by A.tablespace_name, A.segment_type, A.segment_name

 order by Sum(A.bytes)/1024/1024 desc