如何查看oracle表空間已使用大小Select Segment？用如下語句查詢：select a.tablespace_name，a.bytes/1024/1024 "Sum MB"，(a.byte

如何查看oracle表空間已使用大小Select Segment？

用如下語句查詢：

select a.tablespace_name，a.bytes/1024/1024 "Sum MB"，(a.bytes-b.bytes)/1024/1024 "used MB"，b.bytes/1024/1024 "free MB"，round(((a.bytes-b.bytes)/a.bytes)*100，2) "percent_used" from (select tablespace_name，sum(bytes) bytes from dba_data_files group by tablespace_name) a， (select tablespace_name，sum(bytes) bytes，max(bytes) largest from dba_free_space group by tablespace_name) b where a.tablespace_name=b.tablespace_name order by ((a.bytes-b.bytes)/a.bytes) desc

查詢結果：https://iknow-pic.cdn.bcebos.com/03087bf40ad162d97039cb3b16dfa9ec8b13cdc6