oracle中如何查詢資料表空間

Oracle查詢資料表空間使用方式

　--查詢資料表空間使用方式

SELECT UPPER(F.TABLESPACE_NAME) "資料表空間名",

D.TOT_GROOTTE_MB "資料表空間大小(M)",

D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空間(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 "空閑空間(M)",

F.MAX_BYTES "最大塊(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;

--查詢資料表空間的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;

--查詢資料表空間的總容量

select tablespace_name, sum(bytes) / 1024 / 1024 as MB

from dba_data_files

group by tablespace_name;

--查詢資料表空間使用率

select total.tablespace_name,

round(total.MB, 2) as Total_MB,考試大論壇

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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