如何查询表空间总量,剩余,已用情况

1:查询ORACLE数据库
SELECT F.TABLESPACE_NAME 表空间,
(T.TOTAL_SPACE – F.FREE_SPACE) 已用表空间,
F.FREE_SPACE 剩余表空间,
T.TOTAL_SPACE 总表空间,
(ROUND((F.FREE_SPACE / T.TOTAL_SPACE) * 100)) || ‘% ‘ 剩余表空间百分比
FROM (SELECT TABLESPACE_NAME,
ROUND(SUM(BLOCKS *
(SELECT VALUE / 1024
FROM V$PARAMETER
WHERE NAME = ‘db_block_size’) / 1024)) FREE_SPACE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) F,
(SELECT TABLESPACE_NAME, ROUND(SUM(BYTES / 1048576)) TOTAL_SPACE
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME) T
WHERE F.TABLESPACE_NAME = T.TABLESPACE_NAME
2：查询DB2数据库
select * from table(snapshot_tbs_cfg(‘STUDY’,-1));
其中STUDY是数据库名
-1 表示当前活动的数据库分区
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执行命令：(该命令只检查DMS即数据库类型的表空间)
select
substr(varchar(t.SNAPSHOT_TIMESTAMP),1,13) as time ,
t.TABLESPACE_ID,
substr(t.TABLESPACE_NAME,1,30) as TABLESPACE_NAME,
t.TOTAL_PAGES*t.PAGE_SIZE/1024/1024 as TOTAL_MB_SIZE ,
t.FREE_PAGES*t.PAGE_SIZE/1024/1024 as FREE_MB_SIZE ,
decimal(t.USED_PAGES,31,3)/t.TOTAL_PAGES*100 as USAGE_PERCENT
from table(snapshot_tbs_cfg(‘TPAHIS’,-2)) as t
where t.TABLESPACE_TYPE=0
order by t.TABLESPACE_ID;