關於Oracle 創建用戶SQL 錯誤: ORA-65096: 公用用戶名或角色名無效

SQL> create user "fdf01" identified by "fdf01";
create user "fdf01" identified by "fdf01"
            *
ERROR at line 1:
ORA-65096: invalid common user or role name

SQL> create user C##fdf01 IDENTIFIED BY  fdf01;

User created.

根據錯誤提示了解，在CDB中用戶得以C##開頭;