记录常用的oracle数据库操作命令：
2.创建表空间：create tablespace oa datafile 'D:\oracle\oradata\orcl\oa.dbf' size 200M autoextend on next 50m maxsize 20480m extent management local;
3.创建用户：create user oa identified by oa default tablespace oa;
4.用户授权：grant connect,dba to oa;
5.导入数据库：imp oa/oa@orcl file=e:\oa.dmp full=y;
8.删除表空间oa：DROP TABLESPACE oa INCLUDING CONTENTS AND DATAFILES;
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