Oracle数据库用户查看操作

一：用户查看

A ： select * from dba_users
B：  select * from all_users
C：  select * from user_users

二：权限查看

A：select * from user_sys_privs
B：select * from user_tab_privs
C：select * from user_col_privs
D：select * from dba_sys_privs
E：select * from dba_tab_privs
F：select * from dba_col_privs
G：select * from session_pivs

三：角色查看

A：select * from dba_roles
B：select * from user_roles_privs
C：select * from dba_roles_privs