oracle表空间的扩展

--表空间使用查询
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

--查询表空间文件路径
SELECT T.TABLESPACE_NAME,D.FILE_NAME,D.AUTOEXTENSIBLE,ROUND(D.BYTES / (1024 * 1024), 2) BYTES_MB,ROUND(D.MAXBYTES/ (1024 * 1024), 2) MAXBYTES_MB,D.STATUS
FROM DBA_TABLESPACES T,DBA_DATA_FILES D
WHERE T.TABLESPACE_NAME =D.TABLESPACE_NAME
ORDER BY TABLESPACE_NAME,FILE_NAME;

--扩展大小
alter database datafile 'C:APPADMINISTRATORPRODUCT11.2.0DBHOME_1DATABASESDE' autoextend on next 50M MAXSIZE UNLIMITED;