oracle创建用户，分配表空间，表空间维护

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创建表空间和临时表空间：

create tablespace testloggingdatafile 'D:/tablespace/test.dbf' size 50m autoextend on next 1m maxsize 20480m  extent management local;create temporary tablespace test_temptempfile 'D:/tablespace/test_temp.dbf'size 50m autoextend on next 1m maxsize 2048m  extent management local;

创建用户：

create user test identified by testdefault tablespace testtemporary tablespace test_temp;

为用户赋权限

grant all privileges to test;(所有权限)grant resource,connect,dba to test;

查看表空间使用情况

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

修改表空间文件大小

alter database datafile  'D:\APP\ADMINISTRATOR\ORADATA\ORACLE\test.DBF'  resize 5000M; select  file_name from dba_data_files where tablespace_name = 'test_data';修改表空间大小不限制，自动增长alter database datafile 'F:\APP\ORACLE\ORADATA\ORCL\test_DATA.DBF' autoextend on maxsize unlimited;

当表空间达到32G时，为表空间新增一个文件，这样表空间就增大到32G+新文件大小了

ALTER TABLESPACE aaaADD DATAFILE 'E:\APP\ORACLE11GR2\ORADATA\ORCL\test_DATA02.DBF'SIZE 32767M;

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