Oracle 12c 没有scott/tiger这个账户，用这个@。。/rdbms/admin/scott 命令也不行

Scott Schema创建脚本
DROP USER SCOTT CASCADE;
GRANT CONNECT,RESOURCE,UNLIMITED TABLESPACE TO SCOTT IDENTIFIED BY tiger;
CONNECT SCOTT/tiger
CREATE TABLE DEPT
(DEPTNO NUMBER(2) CONSTRAINT PK_DEPT PRIMARY KEY,
DNAME VARCHAR2(1