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前提:必须有DBA权限,有权限查询表空间使用情况
--查看表空间使用情况
SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
D.TOT_GROOTTE_MB "表空间大小(M)",
D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) /D.TOT_GROOTTE_MB * 100,2),
‘990.99‘) || ‘%‘ "使用比",
F.TOTAL_BYTES "空闲空间(M)",
F.MAX_BYTES "最大块(M)"
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;
--查看某个表的表空间使用情况
SELECT a.owner,a.segment_name,a.bytes,a.bytes/ 1024 / 1024 as MB FROM dba_segments a where a.segment_name like ‘TABLENAME%‘;
SELECT * FROM dba_segments a where a.segment_name like ‘TABLENAME%‘;
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原文地址:http://www.cnblogs.com/bonnie-lbn/p/4304022.html