Oracle 表空間使用率

SELECT total.tablespace_name,

       Round(total.MB, 2)           AS Total_MB,

       Round(total.MB - free.MB, 2) AS Used_MB,

       Round(( 1 - free.MB / total.MB ) * 100, 2)

       || '%'                       AS Used_Pct

FROM   (SELECT tablespace_name,

               Sum(bytes) / 1024 / 1024 AS MB

        FROM   dba_free_space

        GROUP  BY tablespace_name) free,

       (SELECT tablespace_name,

               Sum(bytes) / 1024 / 1024 AS MB

        FROM   dba_data_files

        GROUP  BY tablespace_name) total

WHERE  free.tablespace_name = total.tablespace_name;