Oracle 查询表空间使用情况

select *

  from (Select a.tablespace_name,

               to_char(a.bytes / 1024 / 1024, '99,999.999') total_bytes,

               to_char(b.bytes / 1024 / 1024, '99,999.999') free_bytes,

               to_char(a.bytes / 1024 / 1024 - b.bytes / 1024 / 1024,

                       '99,999.999') use_bytes,

               to_char((1 - b.bytes / a.bytes) * 100, '99.99') || '%' use

          from (select tablespace_name, sum(bytes) bytes

                  from dba_data_files

                 group by tablespace_name) a,

               (select tablespace_name, sum(bytes) bytes

                  from dba_free_space

                 group by tablespace_name) b

         where a.tablespace_name = b.tablespace_name

        union all

        select c.tablespace_name,

               to_char(c.bytes / 1024 / 1024, '99,999.999') total_bytes,

               to_char((c.bytes - d.bytes_used) / 1024 / 1024, '99,999.999') free_bytes,

               to_char(d.bytes_used / 1024 / 1024, '99,999.999') use_bytes,

               to_char(d.bytes_used * 100 / c.bytes, '99.99') || '%' use

          from (select tablespace_name, sum(bytes) bytes

                  from dba_temp_files

                 group by tablespace_name) c,

               (select tablespace_name, sum(bytes_cached) bytes_used

                  from v$temp_extent_pool

                 group by tablespace_name) d

         where c.tablespace_name = d.tablespace_name)

 order by tablespace_name;