
CONN @orcl AS SYSDBA
ALTER USER SYS IDENTIFIED BY syspwd;
ALTER USER SYSTEM IDENTIFIED BY systempwd;

ALTER USER SCOTT ACCOUNT UNLOCK;
ALTER USER HR ACCOUNT UNLOCK;
ALTER USER SCOTT IDENTIFIED BY tiger;
ALTER USER HR IDENTIFIED BY hrpwd;

CONN scott/tiger@orcl
CREATE TABLE emp_bak AS SELECT * FROM emp;
CREATE TABLE dept_bak AS SELECT * FROM dept;

