列出所有用户:
select * from all_users; select * from dba_users;
查询表空间(Oracle只有表空间,没有数据库):
select * from v$tablespace;
Oracle查看所有用户及表
select TABLE_NAME,OWNER from all_tables ORDER BY OWNER ASC;
查看scott用户下所有表
select TABLE_NAME from dba_tables t where t.owner='SCOTT'; select table_name from user_tables;
Oracle数据文件datafile存放位置
select name from v$datafile;