查询用户权限

select (case
         when ((select count(*) from dba_users where username = '&Username') > 0) then
          dbms_metadata.get_ddl('USER', '&Username')
         else
          to_clob('   -- Note: User not found!')
       end) Extracted_DDL
  from dual
UNION ALL
select (case
         when ((select count(*)
                  from dba_ts_quotas
                 where username = '&Username') > 0) then
          dbms_metadata.get_granted_ddl('TABLESPACE_QUOTA', '&Username')
         else
          to_clob('   -- Note: No TS Quotas found!')
       end)
  from dual
UNION ALL
select (case
         when ((select count(*)
                  from dba_role_privs
                 where grantee = '&Username') > 0) then
          dbms_metadata.get_granted_ddl('ROLE_GRANT', '&Username')
         else
          to_clob('   -- Note: No granted Roles found!')
       end)
  from dual
UNION ALL
select (case
         when ((select count(*)
                  from dba_sys_privs
                 where grantee = '&Username') > 0) then
          dbms_metadata.get_granted_ddl('SYSTEM_GRANT', '&Username')
         else
          to_clob('   -- Note: No System Privileges found!')
       end)
  from dual
UNION ALL
select (case
         when ((select count(*)
                  from dba_tab_privs
                 where grantee = '&Username') > 0) then
          dbms_metadata.get_granted_ddl('OBJECT_GRANT', '&Username')
         else
          to_clob('   -- Note: No Object Privileges found!')
       end)
  from dual