【oracle】查看表空间信息

-- 数据库查询表空间使用情况
SELECT Upper(F.TABLESPACE_NAME) "表空间名",
D.TOT_GROOTTE_MB/1024 "表空间大小(G)",
(D.TOT_GROOTTE_MB - F.TOTAL_BYTES)/1024 "已使用空间(G)",
To_char(Round(( D.TOT_GROOTTE_MB - F.TOTAL_BYTES ) / D.TOT_GROOTTE_MB * 100, 2), '990.99')
|| '%' "使用比",
F.TOTAL_BYTES/1024 "空闲空间(G)",
F.MAX_BYTES/1024 "最大块(G)"
FROM (SELECT TABLESPACE_NAME,
Round(Sum(BYTES) / ( 1024 * 1024 ), 2) TOTAL_BYTES,
Round(Max(BYTES) / ( 1024 * 1024 ), 2) MAX_BYTES
FROM SYS.DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) F,
(SELECT DD.TABLESPACE_NAME,
Round(Sum(DD.BYTES) / ( 1024 * 1024 ), 2) TOT_GROOTTE_MB
FROM SYS.DBA_DATA_FILES DD
GROUP BY DD.TABLESPACE_NAME) D
WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME
ORDER BY 1