查看数据的使用空间使用情况

使用SQL语句查看数据的使用空间使用情况
[code="sql"]
select dbf.tablespace_name 对应表空间,
       dbf.totalspace "总量(M)",
       dbf.totalblocks as 总块数,
       dfs.freespace "剩余总量(M)",
       dfs.freeblocks "剩余块数",
       (dfs.freespace / dbf.totalspace) * 100 "空闲比例"
  from (select t.tablespace_name,
               sum(t.bytes) / 1024 / 1024 totalspace,
               sum(t.blocks) totalblocks
          from dba_data_files t
         group by t.tablespace_name) dbf,
       (select tt.tablespace_name,
               sum(tt.bytes) / 1024 / 1024 freespace,
               sum(tt.blocks) freeblocks
          from dba_free_space tt
         group by tt.tablespace_name) dfs
where trim(dbf.tablespace_name) = trim(dfs.tablespace_name)