Oracle查询表空间使用情况的方法未必人人知道，下面就为您详细介绍Oracle查询表空间使用情况的方法，供您参考学习之用。
Oracle查询表空间使用情况--查询表空间使用情况
- 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
--查询表空间的free space
- select tablespace_name,
- count(*) as extends,
- round(sum(bytes) / 1024 / 1024, 2) as MB,
- sum(blocks) as blocks
- from dba_free_space
- group by tablespace_name;
--查询表空间的总容量
- select tablespace_name, sum(bytes) / 1024 / 1024 as MB
- from dba_data_files
- group by tablespace_name;
--查询表空间使用率
- 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;
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