[oracle]Oracle查询表空间的每日增长量

SELECT a.snap_id,
       a.con_id,
       e.name pdbname,
       c.tablespace_name ts_name,
       to_char(to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss'), 'yyyy-mm-dd hh24:mi') rtime,
       round(a.tablespace_size * c.block_size / 1024 / 1024, 2) ts_size_mb,
       round(a.tablespace_usedsize * c.block_size / 1024 / 1024, 2) ts_used_mb,
       round((a.tablespace_size - a.tablespace_usedsize) * c.block_size / 1024 / 1024,
             2) ts_free_mb,
       round(a.tablespace_usedsize / a.tablespace_size * 100, 2) pct_used
  FROM cdb_hist_tbspc_space_usage a, 
       (SELECT tablespace_id,
               nb.con_id,
               substr(rtime, 1, 10) rtime,
               max(snap_id) snap_id
          FROM dba_hist_tbspc_space_usage nb
         group by tablespace_id, nb.con_id,substr(rtime, 1, 10)) b,
         cdb_tablespaces c,
         v$tablespace d,
         V$CONTAINERS e
 where a.snap_id = b.snap_id
   and a.tablespace_id = b.tablespace_id
   and a.con_id=b.con_id
   and a.con_id=c.con_id
   and a.con_id=d.con_id
   and a.con_id=e.con_id
   and a.tablespace_id=d.TS#
   and d.NAME=c.tablespace_name
     and  to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') >=sysdate-30
   order by a.CON_ID,a.tablespace_id,to_date(a.rtime, 'mm/dd/yyyy hh24:mi:ss') desc;