Oracle 数据库用户，表空间的创建删除
创建数据库表空间
create tablespace news_tablespace datafile
'F:\oracle\product\10.1.0\oradata\news\news_data.dbf' size 500M;
设置表空间自动增长
alter database datafile 'route of dbf' autoextend on next 100m;
创建用户
create user user_name identified by password tablespace tablespace_name;
用户授权
grant connect,resource to user_name;
删除用户
drop user user_name cascade;
删除表空间，删除表空间前先删除用户
DROP TABLESPACE tablespace_name INCLUDING CONTENTS AND DATAFILES;
查询表空间的名字及其所在位置
以下语句可直接复制进入 pl/sql Developer 运行。
select tablespace_name, file_id, file_name, round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name; 查询表空间使用情况 select a.tablespace_name,a.bytes/1024/1024 "sum MB", (a.bytes-b.bytes)/1024/1024 "used MB",b.bytes/1024/1024 "free MB", round (((a.bytes-b.bytes)/a.bytes)*100,2) "used%" from (select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_name) a, (select tablespace_name,sum(bytes) bytes,max (bytes) largest from dba_free_space group by tablespace_name)b where a.tablespace_name=b.tablespace_name order by ((a.bytes-b.bytes)/a.bytes) desc;
select tablespace_name, file_id, file_name, round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name; 查询表空间使用情况 select a.tablespace_name,a.bytes/1024/1024 "sum MB", (a.bytes-b.bytes)/1024/1024 "used MB",b.bytes/1024/1024 "free MB", round (((a.bytes-b.bytes)/a.bytes)*100,2) "used%" from (select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_name) a, (select tablespace_name,sum(bytes) bytes,max (bytes) largest from dba_free_space group by tablespace_name)b where a.tablespace_name=b.tablespace_name order by ((a.bytes-b.bytes)/a.bytes) desc;