列出所有表空间
select tablespace_name from dba_tablespaces;
列出表空间所有表
select table_name,tablespace_name from user_tables where tablespace_name = '表空间名';
查看所有用户
select * from dba_user;
select * from all_users;
select * from user_users;
Oracle里面三种标准的权限
Connect，
resource
dba
GRANT CONNECT, RESOURCE to username;
删除表空间
DROP TABLESPACE tablespacename INCLUDING CONTENTS CASCADE CONSTRAINTS
删除用户
DROP USER username CASCADE