DBA 常用的几张表
select * from sys.all_all_tables;
select *from sys.all_tab_cols;
select * from sys.all_tab_columns;
select username from dba_users;
select * from dba_data_files;
select * from dba_objects;
select * from dba_tables;
select * from dba_sequences;
select * from dba_views;
select * from all_views;
select * from dba_db_links;
