1、查看数据库中有哪些用户? select username from all_users; 2、查看数据库中有哪些DBA用户? select username from dba_users; 3、查看当前用户拥有哪些表? select table_name from user_tables; 4、Oracle新建表空间,建立用户的步骤? A,创建表空间 create tablespace blueskydb datafile 'D:/oracle/product/10.2.0/oradata/bluesky/blueskydb.dbf' size 500m; B、新建用户 create user bluesky identified by bluesky; C、用户授权 grant resource, connect, RECOVERY_CATALOG_OWNER to bluesky; grant create table to bluesky; alter user bluesky quota unlimited on blueskydb; alter user bluesky default tablespace blueskydb; D、这样就可以了,使用SQLPLUS或其他的工具连接试试吧!