03、oracle dba 查询数据库剩余表空间

一、查询表空间状态、检查表内存是否溢出
SELECT tbs 表空间名,
sum(totalM) 总共大小M,
sum(usedM) 已使用空间M,
sum(remainedM) 剩余空间M,
sum(usedM)/sum(totalM)100 已使用百分比,
sum(remainedM)/sum(totalM)100 剩余百分比
FROM(
SELECT b.file_id ID,
b.tablespace_name tbs,
b.file_name name,
b.bytes/1024/1024 totalM,
(b.bytes-sum(nvl(a.bytes,0)))/1024/1024 usedM,
sum(nvl(a.bytes,0)/1024/1024) remainedM,
sum(nvl(a.bytes,0)/(b.bytes)100),
(100 - (sum(nvl(a.bytes,0))/(b.bytes)100))
FROM dba_free_space a,dba_data_files b
WHERE a.file_id = b.file_id
GROUP BY b.tablespace_name,b.file_name,b.file_id,b.bytes
ORDER BY b.tablespace_name
)
GROUP BY tbs;