查看用户的角色及权限

1、查看所有用户
　　select * from dba_user;
　　select * from all_users;
　　select * from user_users;

2、查看用户系统权限
　　select * from dba_sys_privs;
　　select * from all_sys_privs;
　　select * from user_sys_privs;

3、查看用户对象权限
　　select * from dba_tab_privs;
　　select * from all_tab_privs;
　　select * from user_tab_privs;

4、查看所有角色
　　select * from dba_roles;

5、查看用户所拥有的角色
　　select * from dba_role_privs;
　　select * from user_role_privs;

6、查看当前用户的缺省表空间
　　select username,default_tablespace from user_users;

7、查看某个角色的具体权限
　　如grant connect,resource,create session,create view to TEST;

8、查看RESOURCE具有那些权限
　用SELECT * FROM DBA_SYS_PRIVS WHERE GRANTEE='RESOURCE';

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查看用户的角色及权限